Update simh to V3.8-1. Reviewd by obache@ in PR pkg/43363 filed by me.

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Change Log For V3.8-1

SCP and libraries:

* Fixed bug in DETACH ALL if called at simulator exit (from Dave Bryan)
* Fixed bug in DO command handling of null arguments (from Dave Bryan)
* Fixed bug in DO handling of \\ (literal backslash) (from Dave Bryan)
* Fixed warnings in help printouts

HP2100 (all changes from Dave Bryan)

* Corrected DMS violation register set conditions
* JSB to 0/1 with W5 out and fence = 0 erroneously causes MP abort
* Fixed DJP, SJP, and UJP jump target validation
* BACI: Fixed STC,C losing interrupt request on BREAK
* MPX: Implemented 12792C eight-channel terminal multiplexer
* MT: Fixed missing flag after CLR command
* PIF: Implemented 12620A/12936A Privileged Interrupt Fences

IBM 1401:

* Fixed bug in ZA and ZS (from Bob Abeles)
* Fixed tape indicator implementation (from Bob Abeles)
* Added missing magtape modifier A (from Van Snyder)
* Added -n (no rewind) option to BOOT (from Van Snyder)
* Fixed bug to mask input to 6b on read (from Bob Abeles)

PDP11:

* Moved all Unibus/Qbus support routines to common I/O library
* Fxed bug in ASHP left overflow calc
* Fixed bug in DIVx

VAX:

* Fxed bug in ASHP left overflow calc
* Fixed bug in DIVx
* Resync time of day clock on any clock reset
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Also some pkgsrc fixes, including Linux build:
* add MAKE_FLAGS in pkgsrc Makefile to define USE_NETWORK in dist makefile
* reorganize patch-aa for makefile to reduce diffs:
  * use gmake (USE_TOOLS+=gmake in Makefile)
  * check OSTYPE properly (so that it also builds on Linux)
  * use "else <conditional-directive>" for OSTYPE checks
  * revert previous gcc -> ${CC} change since -std=c99 seems mandatory
* update patch-ac for upstream cosmetics (for "set telnet" using raw mode)
* remove patch-ad for inline definitions since upstream has disabled it
* remove INSTALL_DATA_DIR as suggested by pkglint

Tested on NetBSD/i386 -current and CentOS 5.4 i386.

(tsutsui)