asterisk16: Update to 16.12.0

Changelog:
Bugs fixed in this release:

-----------------------------------
[ASTERISK-28878] -
chan_pjsip: PJSIP_MEDIA_OFFER Broken asterisk 16
(Reported by Joseph Ades)
[ASTERISK-28965] -
res_pjsip: Apply outbound proxy to static contacts on AOR
(Reported by Joshua C. Colp)
[ASTERISK-28930] -
./configure --without-ssl build failure
(Reported by Jaco Kroon)
[ASTERISK-28886] -
chan_pjsip: PJSIP_SC_NULL does not exist in pjproject 2.7.2
(Reported by Jared Smith)
[ASTERISK-28957] -
chan_sip: chan_sip does not process 400 response to an INVITE.
(Reported by Frederic LE FOLL)
[ASTERISK-28888] -
res_corosync: causes asterisk crash in huge distributed environment.
(Reported by Università di Bologna - CESIA VoIP)
[ASTERISK-28955] -
"setvar" doesn't work properly in dahdi-channels.conf
(Reported by Marin Odrljin)
[ASTERISK-28954] -
StreamEcho() only returns 1 active stream
(Reported by Bill Kervaski)
[ASTERISK-28942] -
res_sorcery_memory_cache: Individual object expiration behaves unexpectedly with full backend caching
(Reported by Joshua C. Colp)
[ASTERISK-28953] -
res_pjsip_session: Preserve stream label
(Reported by Joshua C. Colp)
[ASTERISK-28952] -
Queue wrapuptime sometimes not respected (based on stale lastcall time)
(Reported by Walter Doekes)
[ASTERISK-28950] -
Stale code in app_queue to check untouched channel
(Reported by Walter Doekes)
[ASTERISK-28644] -
Stale comment in app_queue about ring_entry exception
(Reported by Walter Doekes)
[ASTERISK-28948] -
ARI channel create doesn't referencing the channel_id parameter
(Reported by sungtae kim)
[ASTERISK-28938] -
core_unreal / core_local: Add support for multistream and re-negotiation
(Reported by Joshua C. Colp)
[ASTERISK-28939] -
res_rtp_asterisk: Don't have send/receive buffers on non-WebRTC
(Reported by Joshua C. Colp)
[ASTERISK-28944] -
bridge_softmix: Transitioning a stream from inactive -> sendrecv/sendonly doesn't re-negotiation
(Reported by Joshua C. Colp)
[ASTERISK-28923] -
T.38 Segfaults in chan_pjsip_queryoption
(Reported by Yury Kirsanov)
[ASTERISK-28940] -
/channels/create doesn't get any parameters from the body
(Reported by sungtae kim)
[ASTERISK-28936] -
res_pjsip: crash when dialing non-sip uri
(Reported by Walter Doekes)
[ASTERISK-28900] -
res_fax: Double frame free when gateway in use with off-nominal format usage
(Reported by Gregory Massel)
[ASTERISK-28929] -
pjproject_bundled: Honor --without-pjproject.
(Reported by Alexander Traud)
[ASTERISK-28932] -
res_pjsip_logger writing too big packets
(Reported by nappsoft)
[ASTERISK-28921] -
Wrong return value check for fwrite when writing to pcap file
(Reported by nappsoft)

Improvements made in this release:

-----------------------------------
[ASTERISK-28959] -
res_pjsip: Added option for disable rport parameter set
(Reported by sungtae kim)
[ASTERISK-28958] -
Continue reading string when ping received by websocket
(Reported by Nickolay V. Shmyrev)
[ASTERISK-28945] -
AMI SendText - add Content-Type parameter
(Reported by Kevin Harwell)
[ASTERISK-28949] -
res_http_websocket: Add masking to websocket client
(Reported by Moises Silva)
[ASTERISK-28899] -
Upgrade Asterisk to bundled pjproject 2.10
(Reported by Kevin Harwell)

(ryoon)