FS-10473: [freeswitch-core] FreeSWITCH crash - Null event pointer dereference during conference_cdr_del #resolve

FS-10286: [mod_conference] Sync member joins up with keyframes in shared encoder mode -- high cpu usage on h264

FS-10456: [mod_av] add wav support to mod_av as well as specifying audio_codec -- add av_record_audio_only param

FS-9785: fix ./mod_conference.h:353:23: error: enumerator value for ‘EFLAG_BLIND_MEMBER’ is not an integer constant expression [-Werror=pedantic] EFLAG_BLIND_MEMBER = (1 << 31)

FS-10433: [mod_av,mod_conference] Crash when video recording fails to setup properly -- fix regression

hand pick db477925 - FS-10447: [freeswitch-core] Manual video refresh mode

FS-10249: [mod_av] Audio gradually falls behind video in recordings -- init timer for audio only as well

FS-9717 [Build-System] Fix missing mods in msi packages. Fix x64 release build on a clean tree on windows.

Conflicts:
	src/switch_channel.c

Conflicts:
	libs/sofia-sip/.update

FS-10189: [core] switch_core_add_state_handler runtime.state_handler_index may exceed SWITCH_MAX_STATE_HANDLERS  #resolve

Conflicts:
	.gitignore
	src/mod/languages/mod_lua/lua/lgc.c

Conflicts:
	Freeswitch.2015.sln