During execution "pjsip show channelstats" cli command by an
external module asterisk crashed. It seems this is a separate
thread running to fetch and print rtp stats. The crash happened on
the ao2_lock method, just before it going to read the rtp stats on
a rtp instance. According to gdb backtrace log, it seems the
session media was already cleaned up at that moment.

ASTERISK-28578

Change-Id: I3e05980dd4694577be6d39be2c21a5736bae3c6f

This was only supposed to be for testing, so now it can be
removed.

Change-Id: I3dfc2e776e70b3196aeed5688372ea80c0214b59

ASTERISK-28586 #close

Change-Id: I43dc4e8bd9dc685b17695b215a5360314074734f

If you specify multiple formats in voicemail.conf, eg. "format = gsm|wav"
and are using realtime ODBC backend, only the first format gets stored
in the database. So when you forward a message later on, there is a bug
generating the email, related to the stored format (GSM) being different
than the desired email format (WAV) specified for the user. Sox can
handle this, but Asterisk needs to tell sox exactly what to do.

ASTERISK-22192

Change-Id: I7321e7f7e7c58adbf41dd4fd7191c887b9b2eafd

Now that both FIR and REMB are being sent in compound packets
these tests can be enabled.

This also extends the REMB nominal test to cover the REMB
contents itself.

Change-Id: Ibfee526ad780eefcce5dd787f53785382210024a

PostgreSQL 12 finally removed column adsrc from table pg_catalog.pg_attrdef
(column default values), which has been deprecated since version 8.0.
Since then, the official/correct/supported way to retrieve the column
default value from the catalog is function pg_catalog.pg_get_expr().

This change breaks compatibility with pre-8.0 PostgreSQL servers,
but has reached end-of-support more than a decade ago.
cdr_pgsql and res_config_pgsql still have support for pre-7.3
servers, but cleaning that up is perhaps a topic for a major release,
not this bugfix.

ASTERISK-28571

Change-Id: I834cb3addf1937e19e87ede140bdd16cea531ebe

When creating an unsolicited MWI aggregate subscription it was possible for
the subscription object to be double unref'ed. This patch removes the explicit
unref as it is not needed since the RAII_VAR will handle it at function end.

Less concerning there was also a bug that could potentially allow the aggregate
subscription object to be added to the unsolicited container twice. This patch
ensures it is added only once.

ASTERISK-28575

Change-Id: I9ccfdb5ea788bc0c3618db183aae235e53c12763

Fixes a failure in /main/taskprocesor unit test, only occurring in Ubuntu.
Newer versions of GCC require variable initialization.

Change-Id: I2994d8aab9307a8c2c7330584f287a27144a580c

* changes:
  res_pjsip_mwi: use an ao2_global object for mwi containers
  res_pjsip/res_pjsip_mwi: use centralized serializer pools

Issues in pjproject 2.9 caused us to revert some of their changes
as a work around.  This introduced another issue where pjproject
wouldn't build with older gcc versions such as that found on
CentOS 6.  This commit replaces the reverts with the official
fixes for the original issues and allows pjproject to be built
on CentOS 6 again.

ASTERISK-28574
Reported-by: Niklas Larsson

Change-Id: I06f8507bea553d1a01b0b8874197d35b9d47ec4c

Here's the basic scenario that occurred when executing an AMI fast originate
while at the same time something else locks the channels container, and also
wants a lock on the dialed channel:

1. pbx_outgoing_attempt obtains a lock on a dialed channel
2. concurrently another thread obtains a lock on the channels container, and
   subsequently requests a lock on the dialed channel. It waits on #1. For
   instance, "core show channel <dialed channel"
3. the outgoing call does not fail, but ends before the pbx_outgoing_attempt
   function exits
4. pbx_outgoing_attempt function exits, the outgoing structure destructs, and
   attempts to hang up the dialed channel
5. hang up tries to obtain the channels container lock, but can't due to #2.
6. Asterisk is deadlocked.

The solution was to allow the pbx_outgoing_exec function to "steal" ownership
of the dialed channel, and handle hanging it up. The channel now is either hung
up prior to it being potentially locked by the initiating thread, or if locked
the hang up takes place in a different thread, thus alleviating the deadlock.

ASTERISK-28561
patches:
  iliketrains.diff submitted by Joshua Colp (license 5000)

Change-Id: I51b42b92dde8f2215b69bb509e28667ee3a3853a

This reverts commit fd2e8d0d.

Reason for revert: Problematic for users who store their voicemail
on network storage devices, or share voicemail storage between
multiple Asterisk instances.

ASTERISK-28567 #close

Change-Id: I3ff4ca983d8e753fe2971f3439bd154705693c41

ASTERISK-28086 #close

Change-Id: Ib3baadc89b9f0477a6f25a63861433812368c5ea

On shutdown it's possible for the unsolicited mwi container to be freed before
other dependent threads are done using it. This patch ensures this can no
longer happen by wrapping the container in an ao2_global object. The solicited
container was also changed too.

ASTERISK-28552

Change-Id: I8f812286dc19a34916acacd71ce2ec26e1042047

Serializer pools have previously existed in Asterisk. However, for the most
part the code has been duplicated across modules. This patch abstracts the
code into an 'ast_serializer_pool' object. As well the code is now centralized
in serializer.c/h.

In addition serializer pools can now optionally be monitored by a shutdown
group. This will prevent the pool from being destroyed until all serializers
have completed.

Change-Id: Ib1e906144b90ffd4d5ed9826f0b719ca9c6d2971

Both res_pjsip and res_pjsip_mwi made use of serializer pools. However, they
both implemented their own serializer pool functionality that was pretty much
identical in each of the source files. This patch removes the duplicated code,
and uses the new 'ast_serializer_pool' object instead.

Additionally res_pjsip_mwi enables a shutdown group on the pool since if the
timing was right the module could be unloaded while taskprocessor threads still
needed to execute, thus causing a crash.

Change-Id: I959b0805ad024585bbb6276593118be34fbf6e1d

ASTERISK-28566 #close

Change-Id: I6daa4e5128e9406d04d3aed670c3bae98d38d40c

This avoids use of the global variable and ensures topic_all remains
active until all topics are freed.

ASTERISK-28553
patches:
  ASTERISK-28553.patch by coreyfarrell (license 5909)

Change-Id: I9a8cd8977f3c3a6aa00783f8336d2cfb9c2820f1

Add a new dialplan function PJSIP_MOH_PASSTHROUGH that allows
the on-hold behavior to be controlled on a per-call basis

ASTERISK-28542 #close

Change-Id: Iebe905b2ad6dbaa87ab330267147180b05a3c3a8

There are some warning messages which are not informative without endpoint:
"No registered subscribe handler for event presence.winfo"
"No registered publish handler for event presence"

This patch adds an endpoint name to these messages.

Change-Id: Ia2811ec226d8a12659b4f9d4d224b48289650827

ASTERISK-28544 #close

Change-Id: I8e62c444d107674c298f472e3545661de8a80dce