c-ares version 1.12.0

Changes:

 o api: add ARES_OPT_NOROTATE optmask value
 
Bug fixes:

 o CVE-2016-5180: ares_create_query single byte out of buffer write [4]
 o configure: acknowledge --disable-tests [1]
 o man pages: fix typos detected by Lintian
 o test: add missing #includes for dns-proto.cc
 o test: avoid in6addr_* constants
 o test: Build with MinGW on AppVeyor
 o Makefile.m32: add support for extra flags
 o Makefile.m32: add support for CROSSPREFIX
 o configure: check if tests can get built before enabled
 o ares_library_cleanup: reset ares_realloc too
 o ahost.c: add cast to fix C++ compile
 o test: Only pass unused args to GoogleTest
 o build: commonize MSVC version detection
 o msvc_ver.inc: support Visual Studio 2015 Update 1, 2, 3
 o test: for AF_UNSPEC, return CNAME only for AAAA, but valid A record
 o ares_getnameinfo: explicitly clear struct servent before use
 o test: Update fuzzing function prototype
 o init: fix nsort initialization
 o test: add fuzzing check script to tests
 o web: http => https
 o read_tcp_data: remove superfluous NULL check
 o LICENSE.md: add a stand-alone license file
 o SECURITY.md: suggested "security process" for the project
 o ares_init_options: only propagate init failures from options [2]
 o headers: remove checks for and defines of variable sizes
 o test: fix gMock to work with gcc >= 6.x [3]
 
Thanks go to these friendly people for their efforts and contributions:

  Alexander Drachevskiy, Brad House, Chris Araman, Daniel Stenberg,
  David Drysdale, Gregor Jasny, Svante Karlsson, Viktor Szakats

References to bug reports and discussions on issues:

 [1] = https://github.com/c-ares/c-ares/issues/44
 [2] = https://github.com/c-ares/c-ares/issues/60
 [3] = https://github.com/google/googletest/issues/705#issuecomment-235067917
 [4] = https://c-ares.haxx.se/adv_20160929.html
