Unbound 1.5.2

Features:
* local-zone: example.com inform makes unbound log a message with
  client IP for queries in that zone. Eg. for finding infected hosts.
* patch from Stephane Lapie that adds to the python API, that
  exposes struct delegpt, and adds the find_delegation function.
* Updated contrib warmup.cmd/sh to support two modes - load from
  pre-defined list of domains or (with filename as argument) load from
  user-specified list of domains, and updated contrib
  unbound_cache.sh/cmd to support loading/save/reload cache to/from
  default path or (with secondary argument) arbitrary path/filename
* patch for remote control over local sockets. Use control-interface:
  /path/sock and control-use-cert: no.
* unbound-checkconf -f prints chroot with pidfile path.
* infra-cache-min-rtt patch from Florian Riehm, for expected long
  uplink roundtrip times.

Bug Fixes:
* config.guess and config.sub update from libtoolize.
* getauxval test for ppc64 linux compatibility.
* make strip works for unbound-host and unbound-anchor.
* print query name when max target count is exceeded.
* patch from Stuart Henderson that fixes DESTDIR in
  unbound-control-setup for installs where config is not in the prefix
  location.
* [bugzilla: 634 ] Fix #634: fix fail to start on Linux LTS 3.14.X,
  ignores missing IP_MTU_DISCOVER OMIT option.
* Patch to contrib/unbound_munin_ that uses type ABSOLUTE.
  Allows munin.conf: [idleserver.example.net]
  unbound_munin_hits.graph_period minute
* Fix pyunbound ord call, portable for python 2 and 3.
* Fix unintended use of gcc extension for incomplete enum types,
  compile with pedantic c99 compliance.
* Fix pyunbound byte string representation for python3.
* Fix 0x20 capsforid fallback to omit gratuitous NS and additional
  section changes.
* Fix validation failure in case upstream forwarder (ISC BIND) does
  not have the same trust anchors and decides to insert unsigned NS
  record in authority section.
* Fix scrubber with harden-glue turned off to reject NS (and other
  not-address) records.
* iana portlist update.
* [bugzilla: 643 ] Fix doc/example.conf.in: unnecessary whitespace.

(pettai)