Merge pull request #30 in FSA/freeswitch-advantage from ~ANDYWOLK/freeswitch-advantage:FS-11097-add-opencv-3.x-support to v1.8-fsa

* commit 'b3642b8e':
  FS-11097: [mod_cv] Add OpenCV 3.x support.

Merge pull request #29 in FSA/freeswitch-advantage from ~ANDYWOLK/freeswitch-advantage:FS-11091-remove-libsndfile-from-the-code to v1.8-fsa

* commit 'a71ede5f':
  FS-11091: [mod_sndfile] Remove libsndfile from the code base, use pre-compiled binaries on Windows, update to libsndfile 1.0.28

FS-11091: [mod_sndfile] Remove libsndfile from the code base, use pre-compiled binaries on Windows, update to libsndfile 1.0.28

Merge pull request #28 in FSA/freeswitch-advantage from ~ANDYWOLK/freeswitch-advantage:FS-11090-move-pcre-library-to-pre-compiled to v1.8-fsa

* commit '248defab':
  FS-11090: [Build-System] Move PCRE library to pre-compiled binaries, minor cleanup, reduce build log verbosity on windows.

FS-11090: [Build-System] Move PCRE library to pre-compiled binaries, minor cleanup, reduce build log verbosity on windows.

Merge pull request #27 in FSA/freeswitch-advantage from ~ANDYWOLK/freeswitch-advantage:FS-11087-use-shared-zlib-library-on-windows to v1.8-fsa

* commit '79dd9026':
  FS-11087: [Build-System] Use shared zlib library on Windows.

Merge pull request #26 in FSA/freeswitch-advantage from ~ANDYWOLK/freeswitch-advantage:feature/FS-11014-refactor-vad-code-in-core to v1.8-fsa

* commit '8fa8749e':
  FS-11014: [core] Add vad to core on Windows.

FS-11016: [mod_av] Looping a video file that has resize feature enabled can allow a non-resized frame to slip after file seek #resolve

FS-10908: [mod_amqp] AMQP routing key (format_fields) formation broke and invalid reads reported by valgrind #resolve

In some scenarios (e.g. MetaSwitch interop) the `display` field of callee-id should be left empty instead of being overwritten with the number.
As is done in other places, we allow for `_undef_` to mean "leave the field empty".

FS-10521 FS-10612 [mod_callcenter] Member exit reason set to EXIT_WITH_KEY when it should be TIMEOUT and only set EXIT_WITH_KEY if the key pressed is set at cc_exit_keys