Fix the build, add new emuxki_boards.c

(martin)

emuxki(4): import a list of board definitions

This is inspired by the cxdtv(4) driver.

Tested on NetBSD/amd64 with a Sound Blaster Live! Value (CT4870, PCI)
and with a Sound Blaster Audigy Rx 7.1 (SB1550, PCIe).

Additional sound cards sponsored by the NetBSD Foundation; thanks!

(khorben)

Turn fpu_sub() macro into static inline function for clarity.
No binary changes.

(rin)

Update to match recent changes in implementation.

(pgoyette)

emuxki(4): place struct emuxki_softc into its own file

NFCI

(khorben)

emuxki(4): restrict DMA memory within the first 2GB

As implemented in the driver, the EMU10K1 chip can only address memory
up to 31-bit addresses.

Tested on NetBSD/amd64 with a Sound Blaster Live! Value (CT4870, PCI)
and with a Sound Blaster Audigy Rx 7.1 (SB1550, PCIe).

Additional sound cards sponsored by the NetBSD Foundation; thanks!

(khorben)

NetBSD/x86: Raise the number of interrupt sources per CPU from 32 to 56.

There has been no objection for three years.
    https://mail-index.netbsd.org/port-amd64/2019/09/22/msg003012.html
Implemented by nonaka@n.o, updated by me.

(knakahara)

tpm(4): add missing newline character in device_printf()

Observed with on a Sun Ultra 24, NetBSD/amd64:

tpm0 at acpi0 (TPM, IFX0102-1): io 0x4e-0x4f,0x4700-0x470b mem 0xfed40000-0xfed44fff
tpm0: device 0x000b15d1 rev 0x10
tpm0: read 8 bytes, expected 10tpm0: deactivating entropy source

(khorben)

emuxki(4): allow building as a module

Tested on NetBSD/amd64 with a Sound Blaster Live! Value (CT4870)

Note that this required setting outputs.master to the maximum value
allowed (255) to get sound out, and then cranking the volume pretty
high.

Additional sound cards sponsored by the NetBSD Foundation; thanks!

(khorben)

Style sync with other parts of this file, as well as FreeBSD:
https://cgit.freebsd.org/src/commit/sys/powerpc/fpu/fpu_sqrt.c?id=81dd9c5e69a2709ae3317dd383093e1c8a970d9e

NFC since q is initialized to zero just above.

(rin)

Fix errors in calculation of intermediate mantissa bits > 95.

NFC since this does not affect the final results; we do not
support any extended-precision formats at the moment (never?).

Taken from FreeBSD:
https://cgit.freebsd.org/src/commit/sys/powerpc/fpu/fpu_sqrt.c?id=81dd9c5e69a2709ae3317dd383093e1c8a970d9e
except for stylistic changes that will be committed soon.

(rin)

fpu_sub(): Do not invert sign bit of NaN.

Taken from FreeBSD:
https://cgit.freebsd.org/src/commit/lib/libc/sparc64/fpu?h=releng/12.3&id=8ff9d52cd08cbf31efde4052d3593a5680eaa2a5

(rin)

fpu_mul(): Do not multiply sign bits for NaN.

(rin)

Fix priority for NaN propagation: frA > frB > frC.

(rin)

FPU generates QNaN with all payload bits being cleared.

(rin)

IEEE 754 and Power ISA require sqrt(+0) = +0 and sqrt(-0) = -0, not Inf.

(rin)

posix_openpt.3: add caveats about oflags

The NetBSD implementation differs from other BSDs in that it does not
return EINVAL if invalid oflags are submitted, since it completely
ignores them. This is surprising to upstream projects that may expect
otherwise.

(gutteridge)

Update loadbsd source and distribution binary to version 3.2.
Including the following changes by Gunther Nikl:
- Added detection of A600.
- Fix handling of multiple -n options.
Make it compile with recent AmigaOS gcc ports (for example gcc6), as
older ports no longer work with current NetBSD header files.

(phx)

Resequence the sysctl_setup and evcnt stuff so that they always occur
_before_ the module's MODULE_CMD_INIT call.  Also update the unload
code to invoke the sysctl_setup and evcnt stuff _after_ the module's
MODULE_CMD_FINI call.  This makes the behaviour and order consistent
whether the module is built-in or loaded at run-time.

As reported by riastradh@

(pgoyette)

Use the ACPICA define ACPI_DBG2_16550_WITH_GAS

(skrll)

pcihost: Track MSI/MSI-X interrupt handlers.

Track the MSI/MSI-X interrupt handlers so that fdtbus_intr_disestablish
doesn't get called for them.

This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.

(skrll)

Don't hold a spin lock entering usbd_transfer.

This avoids a crash found with LOCKDEBUG.

(nat)

Do a full screen update upon vt switch.

(nat)

Ensure the device is fully initialized before starting the update thread.

(nat)

Don't throttle the frame rate.

Throttling of the frame rate is no longer necessary as most screen updates are
now partial updates.

(nat)

Finally fix the blitting function.

This means better performance for mostly static displays.
Full screen updates are still done five times a second.

Introduce a new variable sc_clear to force a full update.

(nat)

Fix compile error. Compile test only.

(msaitoh)

make.1: clarify interpretation of conditionals

String literals in quotes are never interpreted as numbers.

The operators '<', '<=', '>', '>=' are only allowed in numeric
comparisons.

Avoid the term 'C relational operators' since in C, the relational
operators exclude '==' and '!=', which are called equality operators
instead.

(rillig)

Fix logic error in pktq_set_maxlen() description.

Ok thorpej@

(wiz)

x86: Fix interaction between consinit, device_pci_register, and drm.

Leave an essay on what's going on here in both places with
cross-references.

PR kern/56996

(riastradh)

G/C ISSET() macro copies.  It has been defined in <sys/types.h> since 2006.

(tsutsui)

pkgqueue(9): fix some nits, remove trailing whitespace

(wiz)

G.C. No functional change.

(msaitoh)

Print oqdrops correctly.

(msaitoh)

Clean up fpu_extern.h; only a function public to external is fpu_emulate().

Other functions are private to fpu_*.c and therefore live in fpu_emu.h.

Also, drop needless forward struct declarations.

NFC.

(rin)

static-fy fpu_execute().

(rin)

static-fy fpu_[ixsd]tof(). NFC.

(rin)

Get if_data correctly when kvm is used.

(msaitoh)

Fix "MPLS handled this" detection logic in the rump environment.

(thorpej)

make: add more details to error message for numeric comparison

Before:
String comparison operator must be either == or !=

After:
Comparison with '>=' requires both operands 'no' and '10' to be numeric

Noticed by martin@ in pkgsrc/textproc/py-pygments.

(rillig)

Unconditionally include <sys/systm.h> for KASSERT{,MSG}().
Fix (!DIAGNOSTIC && !DEBUG) build.

(rin)

revert 1.281
VNDIOCLR requires write access to unconfigure a unit, even when the unit
is read-only.

(mlelstv)

Document the pktqueue interface.

(thorpej)

Sort.

(thorpej)

In pktq_flush():
- Run a dummy softint at IPL_SOFTNET on all CPUs to ensure that the
  ISR for this pktqueue is not running (addresses a pre-existing XXX).
- Hold the barrier lock around the critical section to ensure that
  implicit pktq_barrier() calls via pktq_ifdetach() are held off during
  the critical section.
- Ensure the critical section completes in minimal time by not freeing
  memory during the critical section; instead, just build a list of the
  packets pulled out of the per-CPU queues and free them after the critical
  section is over.

(thorpej)

Revert previous

kern/56994: wm(4) panic on attach in interrupt_distribute, sometimes

(skrll)

Add standard inet headers.

(rjs)

Trailing white-space/TAB.

(rin)

Simplify; no need to override ``type'' here. NFC.

(rin)

Simplify logic to remove needless goto. NFC.

(rin)

Update FR and FI (and undefined FPRF) for ``round to integer'' insns.

(rin)

Fix logic for FI, FR, and FPRF fields of FPSCR.

They are not sticky bits and updated by arithmetic and round
insns at the same time.

Comparison insns update only FPCC sub-field of FPRF.

For other insns, these field are left untouched.

Also, for single-precision insns, exception bits should be set by
the first fpu_implode(), which rounds the value to float.

(rin)

Release mutexes earlier in xenevt_free(), to call *destroy and kmem_free
without holding spin locks. Fixes an occasional deadlock seen when the qemu
backing a HVM domU exits.

(bouyer)

pcihost: Don't call fdtbus_intr_disestablish for MSI/MSI-X interrupts.

This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.

(skrll)

Fix debug printf. Unbreak DEBUG build.

(rin)

Remove extra break.

(rin)

bge(4): Use BUS_DMA_WAITOK in ring initilization now that it's safe

(skrll)

bge(4): fix the MP improvements and improve some more.

- Have two locks sc_core_lock at IPL_NONE and sc_intr_lock at IPL_NET and
  use appropriately.

- Use stopping flags instead of bge_if_flags so that bge_if_flags only
  needs to be protected by the sc_core_lock

- Use ifmedia_init_with_lock and provide the sc_intr_lock. mii operatiions
  are done from the interrupt handler.

- Fixup locking in bge_detach.

- Rename bge_watchdog to bge_watchdog_tick to avoid confusion with the
  if_watchdog method.

- Sprinkle some more asserts.

(skrll)

bge(4): use a local variable to make bge_ifmedia initialization pretty.

NFC

(skrll)

Machete-waving to fix mpls rump build after pktqueue changes.

(thorpej)

Only update distrib/sets/lists/tests/mi with valid files

sync-mi: use CVS/Entries to ensure we only update
distrib/sets/lists/tests/mi with files known to CVS.

Reviewed by: rillig

(sjg)

bpf(4): Reject bogus timeout values before arithmetic overflows.

Reported-by: syzbot+fbd86bdf579944b64a98@syzkaller.appspotmail.com
https://syzkaller.appspot.com/bug?id=60d46fd4863952897cbf67c6b1bcc8b20ec7bde6

XXX pullup-8
XXX pullup-9

(riastradh)

netisr.c is gone.

(mlelstv)

make: untangle output handling in jobs mode, remove redundant braces

No functional change.

(rillig)

make: fix handling of null bytes in the output in jobs mode

The test job-output-null failed occasionally, depending on the exact
timing of the child's write and make's read.

(rillig)

Make build with WARNS=5.

(tsutsui)

Localize addr and buf. NFC.

(rin)

Fix weird logic. NFC.

Set both type and size to double by default, and change both to
single if required.

(rin)

Do not use ``cond'' for two purposes: flag and bit field.
For the latter, use ``bits'' instead. Switch ``cond'' to int.
NFC.

(rin)

tests/make: remove nonexistent file from file list

The file had been added accidentally, it never existed in distdir.

(rillig)

Remove <net/netisr.h>

(thorpej)

Garbage-collect everything related to struct domain::dom_ifqueues
(except dom_ifqueues itself, until the next kernel version bump).
It's no longer used now that nothing uses the legacy netisr mechanism.

(thorpej)

Garbage-collect the remaining vestiges of netisr.

(thorpej)

Convert MPLS from a legacy netisr to pktqueue.

(thorpej)

Convert CAN from a legacy netisr to pktqueue.

(thorpej)

Convert NETATALK from a legacy netisr to pktqueue.

(thorpej)

Convert ARP from a legacy netisr to pktqueue.

(thorpej)

make: clean up handling of .break in .for loops

Move For_Break further up, as the functions in that file are sorted from
small to big.  The cast from size_t to unsigned int is required by lint.

In parse.c, move the code into a separate function to keep
ParseDirective small.  Its only job is to parse the directive and then
delegate to another function doing the actual work.

In the manual page, remove empty lines.

In the test, ensure that .break stops processing of the .for loop
immediately; anything after the .break is not processed anymore.
Replace ':=' with '=', as there is no need to evaluate '$i' early.
Check the expected value in the .mk file instead of the .exp file, to
keep the reading scope as small as possible.

(rillig)

Only use configured RPS hash functions for IPv4 and IPv6 packets.

This is NFC change now because only IPv4 and IPv6 use pktqueue,
but that will change in future commits.

(thorpej)

Remove unnecessary inclusion of <net/netisr.h>.

(thorpej)

Enable make/unit-tests/directive-for-break

Also ensure MAKE_VERSION is ignored.

(sjg)

make: add .break to terminate .for loop early

When .break is encountered within a .for loop
it causes immediate termination.

Outside of a .for loop .break causes a parse error.

Reviewed by: christos

(sjg)

fpu_implode(): Clear lower word for float just for sure.

(rin)

Fix fres and frsqrte.
- Pass correct fp to succeeding fpu_implode().
- fres calculates 1 / frB; not 1 / sqrt(frB).

(rin)

Make fpu_explode() and fpu_implode() take uint64_t and uint64_t *,
instead of register number, respectively. NFC.

(rin)

Use hi and lo for higher and lower words, instead of i and j.
No binary changes.

(rin)

fpu_subr.c: Convert #ifdef DIAGNOSTIC panic() --> KASSERT{,MSG}().

(rin)

Fix off-by-one error in exponent when round a double to the
largest normalized value; QNaN was wrongly generated here.

(rin)

Make fpu_ftod() return uint64_t value. NFC.

(rin)

dtrace_fbt: Allow tracing names that start with `__'.

This was never relevant on FreeBSD and I don't think it is relevant on
NetBSD either.  The FreeBSD change to lift this restriction had the
following comment:

    r306570 | markj | 2016-10-02 00:35:00 +0000 (Sun, 02 Oct 2016) | 7 lines

    Allow tracing of functions prefixed by "__".

    This restriction was inherited from upstream but is not relevant on FreeBSD.
    Furthermore, it hindered the tracing of locking primitive subroutines.

(riastradh)

Whitespace - mostly align the line continutation characters

(skrll)

KNF. No functional change.

(msaitoh)

Fix "error: cast from pointer to integer of different size" on
sparc build.

(nakayama)

Re-factor how pktq_barrier() is issued by if_detach().

Rather than excplicitly referencing ip_pktq and ip6_pktq in if_detach(),
instead add all pktqueues to a global list.  This list is then used in
the new pktq_ifdetach() function to issue a barrier on all pktqueues.

Note that the performance of this list is not critical; it will seldom
be accessed (then pktqueues are created/destroyed and when network
interfaces are detached), and so a simple synchronization strategy using
a rwlock is sufficient.

(thorpej)

Fix the syntax of the non _LP64 code fragment to match that in the
_LP64 fragment, so hopefully 32 bit ports with XEN (i386) will
build again.

(kre)

f_detach(): Drain the protocol input queues before the pr_purgeif()
calls; pktq_barrier() doesn't remove packets from the queue, it waits
for the packets enqueued before the barrier to drain.  This, in turn,
may cause the protocols to gain additional references to the interface
that's detaching.  By draining the queues first, we ensure that no
additional references will be taken after calling pr_purgeif().

(thorpej)

pktqueue: Re-factor sysctl handling.

Provide a new pktq_sysctl_setup() function that attaches standard
pktq sysctl nodes below a specified parent node, with either a
fixed node ID or CTL_CREATE to dynamically assign node IDs.  Make
all of the sysctl handlers private to pktqueue.c, and remove the
INET- and INET6-specific pktqueue sysctl code from net/if.c.

(thorpej)

ktrace.1: correct historical reference and minor grammar tweak

(gutteridge)

kdump.1: use past tense for history

(gutteridge)

cprng_fast(9): Assert not in pserialize read section.

This may sleep to take the global entropy lock in case it needs to be
reseeded.  If that happens we can't be in a pserialize read section.

(riastradh)

nd6: Take ifnet psref around cprng_fast in nd6_slowtimo.

This may sleep on an adpative mutex, the global entropy lock, so
pserialize is forbidden.

(riastradh)

xhci(4): Make sure to destroy sc_rhlock on detach.

(riastradh)

drmfb: Rework console detection and takeover.

While here, simplify logic by removing an unreachable error branch so
we never have to contemplate unwinding claiming of the console.

(riastradh)

Call extent_alloc_subregion() with EX_MALLOCOK; under heavy I/O load we need
lots of them and the preallocatted extent descriptors are not enough.

(bouyer)

process_msg() is called from thread context, so malloc() can wait for
memory. Should avoids occasional ENOMEM reading messages

(bouyer)

in backend drivers, use xen_shm_(un)map for the rings instead of inline,
mostly duplicate code.

(bouyer)

Redo previous; kill the right printf()

(bouyer)

xen: Add experimental support for PVH dom0.

(bouyer)

Add commented out experimental PVH dom0 options and pseudo-device

(bouyer)

Remove a noisy printf; HVM guests triggers it (a lot) and it seems to be
expected.

(bouyer)

Add PVH support for backend drivers grant operation.
Now a domU in a PVH dom0 boots multiuser.

(bouyer)

Adjust privcmd_notify() so it has a chance to work in a PVH environnement too.

(bouyer)

drmfb: Take is_console property from parent, not from self.

The parent is the pci or platform device that firmware knows about.
The `drmfb' device is more of a fictitious invention of the drm stack
that exists for the convenience of the genfb abstraction which needs
device_private to be a struct genfb_softc.

Let's see if this does any better than the last attempt to rework the
logic here.

(riastradh)

i915: Stop pretending the GTT size is zero as workaround.

Whatever bug this was I don't know how to reproduce any more.
Convinces Mesa iris_dri.so to work on this kernel.

(riastradh)

drm_mm: Give up on trying to phrase find_hole with public rbtree API.

Firefox works with WebGL on Mesa iris_dri.so now.

(riastradh)

KNF. No functional change.

(msaitoh)

drm: Fix dma fence stub fix so the lock is actually initialized.

Tested but forgot to amend change before exporting to CVS again.

(riastradh)

Do not raise SNaN exception for QNaN.

(rin)

Set FPSCR[FPRF] for calculated result, for all instructions
that are documented to update this field.

Exceptions are fcti{w,d}{,z}; FPSCR[FPRF] becomes undefined,
according to Power ISA. We do not overwrite this field for
these insns at the moment.

(rin)

static-fy fpu_fto[ixsd](). NFC.

(rin)

Further fix for fcti{w,d}{,z}.

- Treat {Q,S}NaN correctly.
- Set exception bits appropriately.
- Introduce round_int().

(rin)

Remove stale comment.

(rin)

pktq_rps_hash(): Make the "funcp" argument const.

(thorpej)

pktq_dequeue(): Prevent packets from getting stuck beind barrier markers.

pktq_barrier() ensures that all packets enqueued before the barrier have
been dequeued before the barrier returns.  However, previously, pktq_dequeue()
would return NULL when a barrier marker was encountered.  If there were
packets queued up behind the marker and no additional softint were scheduled
for the pktqueue, those packets would end up stranded.  pktq_dequeue() now
continues to the next slot after the marker, ensuring that processing can
continue after the barrier has been signaled.

(thorpej)

drm: Fix dma fence stub so it works with locking operations.

(riastradh)

drm_mm: Match __drm_mm_interval_first semantics.

- Use the right search criterion.
- Return &mm->head_node, not NULL, if not found.

(riastradh)

If we check XENPV, make sure to #include "opt_xen.h"

(bouyer)

Remove XENPV support from xenmem; it's only used for !XENPV at this time.

(bouyer)

Work in progress on dom0 PVH support: ioctl support for tools.
Basically, in PVH mode (where XENFEAT_auto_translated_physmap is enabled),
the hypervisor will not map foreing ressources in our virtual address
space for us. Instead, we have to pass it an address in our physical
address space (but not mapped to some RAM) where the ressource will show up
and then enter this PA in pour page table.

For this, introduce xenmem_* which manage the PA space. In PVH mode this
is just allocated from the iomem_ex extent.

With this, I can start a PV domU, and the guest's kernel boots (and
the console works). It hangs because the backend driver can't map the
frontend ressources (yet).

Note that, per https://xenbits.xen.org/docs/unstable/support-matrix.html,
dom0 PVH support is still considered experimental by Xen.

(bouyer)

dtrace_sdt: Fix bug in builtin module reference counting.

Don't module_hold(NULL)!  This mistake was introduced in my attempt
to get dtrace working for sdt probes defined in non-builtin modules
like zfs.

(riastradh)

reallocarr(3): Touch up xrefs.

(riastradh)

reallocarr(3): Bump date.  Note overflow is handled internally.

(riastradh)

reallocarr(3): Clarify semantics.

(riastradh)

Fix previous to make it compile again.

(msaitoh)

crashme(9): New debug.crashme.mutex_recursion method.

Takes a lock twice.  Set it to 1 for adaptive lock, 2 for spin lock.

(riastradh)

lockdebug(9): Try to show symbol names if possible.

Also print the possible owner in ddb/crash `show lock' even if the
kernel is built without LOCKDEBUG.

Output may not be as pretty before with two neatly aligned columns,
but that can be changed; for now the value of having the symbols
printed instead of just obscure hex addresses (which one's an lwp
address and which one's a code pointer? can never remember!) should
outweigh the prettiness temporarily lost.

(riastradh)

ddb(9): Make db_symstr safe to use concurrently with pserialize(9).

(riastradh)

ddb(4): Use db_num_to_strbuf in db_symstr.

Simplifies it and will make safer to use.

(riastradh)

ddb(9): New db_num_to_strbuf.

Like db_num_to_str, but writes to caller-provided buffer instead of
returning pointer to static storage.

(riastradh)

/etc/ssh: Install ssh_known_hosts with mode 644.

Makes it agree with the mtree and more convenient for admin to edit.

XXX pullup-8
XXX pullup-9

(riastradh)

Tickets #1512 - #1514

(martin)

Pull up following revision(s) (requested by tsutsui in ticket #1514):

distrib/atari/floppies/common/dot.profile: revision 1.9
distrib/vax/inst-common/dot.commonutils: revision 1.6
distrib/amiga/miniroot/dot.profile: revision 1.11
distrib/utils/script-installer/dot.commonutils: revision 1.8
distrib/amiga/floppies/inst-common/dot.commonutils: revision 1.9

Fix yet another "[: SMALL test, no fallback usage" error on installation.

The same problem as PR/54835 of the miniroot scripts, i.e.
avoid and replace use of -o binary primary marked obsolescent
by POSIX.1-2017:
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html#tag_20_12
8_16

Noticed on installation of NetBSD 9.3 on TT030, and
maybe should be pulled up to netbsd-9.

Avoid more obsolescent binary primaries not supported by crunched test(1).

See PR/54835 and PR/56983 for details.

(martin)

Pull up following revision(s) (requested by tsutsui in ticket #1513):

sys/arch/m68k/m68k/m68k_trap.c: revision 1.3

Minimal (but hackish) change to make a DEBUG kernel compilable.

(martin)

Pull up following revision(s) (requested by tsutsui in ticket #1512):

sys/dev/ata/ata.c: revision 1.163

Output missing '\n' for capability list when DMA support is not compiled in.

(martin)

Ticket #1758

(martin)

Pull up following revision(s) (requested by rin in ticket #1758):

external/mit/xorg/server/drivers/xf86-video-wsfb/Makefile: revision 1.6

wsfb: Disable broken DGA support:
  - dga(1) crashes X server since pScrn->AdjustFrame is NULL.
  - If nop is provided as pScrn->AdjustFrame, dga(1) crashes X server *AND*
    kernel. This is because DGA uses physical address of framebuffer via
    /dev/mem (oops!), but we provide only mmap(2)'ed virtual address.

(martin)

Ticket #1511

(martin)

Pull up following revision(s) (requested by rin in ticket #1511):

external/mit/xorg/server/drivers/xf86-video-wsfb/Makefile: revision 1.6

wsfb: Disable broken DGA support:
  - dga(1) crashes X server since pScrn->AdjustFrame is NULL.
  - If nop is provided as pScrn->AdjustFrame, dga(1) crashes X server *AND*
    kernel. This is because DGA uses physical address of framebuffer via
    /dev/mem (oops!), but we provide only mmap(2)'ed virtual address.

(martin)

Simplify name trimming following a suggestion from rillig.

(martin)

wsfb: add 8bpp planar support for LUNA using amiga's Afb.

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

Confirmed on my LUNA-II with 8bpp board.

(tsutsui)

wsfb: fix mmap size in Afb planar case.

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

"Looks like good improvement" from jandberg@ and also confirmed by rin@.

(tsutsui)

wsfb: reorganize implementation of Afb support.

- use XORG_VERSION_NUMERIC() to check if Afb is avaiable and
  define and use explicit HAVE_SHADOW_AFB macro
- disable all Afb references if it is not available

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

"Looks like good improvement" from jandberg@ and also confirmed by rin@.

(tsutsui)

etc: Fix permissions of various editable configuration files.

This way they match the mtree and make sense and don't cause editors
to ask to override read-only files when editing them.

Exception: Not sure /etc/bluetooth/protocols makes as much sense to
edit, but the mtree says 644, so if you want to change it, make sure
to change it in both places -- Makefile and mtree.

XXX pullup-8
XXX pullup-9

(riastradh)