unbound 1.4.6:

Features:
* Builtin root hints contain AAAA for I.ROOT-SERVERS.NET.
* unbound.h has extern "C" statement for easier include in c++.
* added feature to print configure date, target and options with -h.
* added feature to print event backend system details with -h.
* (ports and works on Minix 3.1.7). On Minix, add /usr/gnu/bin to PATH,
  use ./configure AR=/usr/gnu/bin/gar and gmake.
* GOST enabled if SSL is recent and ldns has GOST enabled too.

Bug Fixes:
* Fix TCPreply on systems with no writev, if just 1 byte could be sent.
* Fix to use one pointer less for iterator query state store_parent_NS.
* Max referral count from 30 to 130, because 128 one character domains is valid DNS.
* added documentation for the histogram printout to syslog.
* Fix assertion failure reported by Kai Storbeck from XS4ALL, the assertion was wrong.
* updated ldns tarball.
* iana portlist updated.
* Unbound reports libev or libevent correctly in logs in verbose mode.
* Fix handling of corner case reply from lame server, follows rfc2308.
* Fix jostle list bug found by Vince (luoce at cnnic), it caused the qps in
  overload situations to be about 5 qps for the class of shortly serviced
  queries.
* Fix the max number of reply-address count to be applied for duplicate queries,
  and not for new query list entries.
* Fix RFC4035 compliance with 2.2 statement that the DNSKEY at apex must be
  signed with all algorithms from the DS rrset at the parent.
* Fix validation of qtype DNSKEY when a key-cache entry exists but no rr-cache
  entry is used (it expired or prefetch), it then goes back up to the DS or
  trust-anchor to validate the DNSKEY.
* log if a server is skipped because it is on the donotquery list, at verbosity
  4, to enable diagnosis why no queries to 127.0.0.1.
* failure to chown the pidfile is not fatal any more.
* Neat function prototypes, unshadowed local declarations.
* Fix integer underflow in prefetch ttl creation from cache.
  This fixes a potential negative prefetch ttl.
* Changed the defaults for num-queries-per-thread/outgoing-range.


(pettai)