FS-7889: [mod_conference] move conference chat to use an event channel so messages only go to the right 'room' for the conference

* commit 'adb5f0d2':
  FS-7130 make /run/freeswitch persistent, so it will start under systemd

FS-7654 regression on eavesdropping on channels playing a file because of channel count of 0 on write frame from stream_file

FS-7869: [mod_conference] fix deadlock on shutdown after playing video file that will not display video

Merge pull request #355 in FS/freeswitch from ~DRAGOS_OANCEA/freeswitch-dragos:opus-encode-repacketize to master

* commit '566a1491':
  FS-7848 : mod_opus: Add ptimes: 80 ms, 100 ms, 120 ms (Opus repacketize)

Revert "FS-7130 make /run/freeswitch persistent, so it will start under systemd"

This reverts commit bdfb8363.

* commit 'f67b6d1c':
  FS-7789 [mod_av] Fixed issue with audio dropping out partway through recordings

* commit 'bb75a34f':
  Restoring commit lost in mod_conference refactor.

Commit c49f8731, which added a vmute
option to the conference member flags, was somehow lost in the
mod_conference refactor. This commit restores the lost code.

FS-7813 #resolve

* commit '99f5234f':
  FS-7854 Add task_runtime to tasks table in core database

This patch adds the task_runtime column to the tasks table in the core
database. The BIGINT type is used for this column because a 64-bit integer
is used to store task runtimes within the scheduler.

This fixes an issue with mod_av where audio was not included for the entire
duration of a recording initiated by something other than the record_av app.

FS-7847: [mod_conference] add layers that do not match the aspect ration of conference by using the new hscale layer param for horizontal scale, and add zoom=true param to crop layer instead of letterbox, add grid-zoom layout group that demonstrates these layouts

FS-7846: [mod_dptools] add eavesdrop_whisper_aleg=true and eavesdrop_whisper_bleg=true channel variables to allow you to start eavesdrop in whisper mode of specific call leg

* commit '59d1bdae':
  FS-7845 whitespace and indention
  FS-7845 File rename to remove mod_* prefix to local module C files. Change function name prefixes from shorthand 'conf' to longer form 'conference'. Also fixes the channel variable names which had been caught in an over zealous perl -pi -e command...
  FS-7845 Rename functions so that they relate to the file that they are located in.
  FS-7845 Refactor of mod_conference to improve compilation speed, and logical organization.