Merge pull request #981 in FS/freeswitch from ~WALDYR/freeswitch:FS-8958-no-controls-for-moderator-on-secondary-canvas to master

* commit 'baba2acd':
  FS-8958 [verto_communicator] Fix no layout controls for moderator on secondary canvas

Merge pull request #982 in FS/freeswitch from ~WALDYR/freeswitch:FS-8976-alert-that-the-login-has-failed to master

* commit 'b6057f10':
  FS-8976 [verto_communicator] Properly alert that the login has failed vs silently failing and sitting there.

FS-8976 [verto_communicator] Properly alert that the login has failed vs silently failing and sitting there.

* commit '9df7bfe0':
  column update with negative nibble rate -- FS-9577
  column update with negative nibble rate

FS-8644: OPUS_SET_BITRATE(), codec control and estimators for packet loss and RTT (with Kalman filters) to detect a slow or congested link.
Feature enabled with "adjust-bitrate" in opus.conf.xml - it's a feedback loop with incoming RTCP.

Merge pull request #969 in FS/freeswitch from ~DRAGOS_OANCEA/freeswitch-dragos:fix_config_rtpip to master

* commit '3d2f3c96':
  FS-9548: return with error on wrong rtp ip given from config

* commit 'c70f06aa':
  FS-9553 #resolve [Refactor video-on-hold]

* commit '5e323ee9':
  newest version of sleep patch
  FS-8623: reapply after update: Fix libvpx Solaris Studio build
  FS-8623: reapply after update: fix sun studio build errors building libvpx
  update to libvpx b46243d from repo https://chromium.googlesource.com/webm/libvpx

Merge pull request #968 in FS/freeswitch from ~DINGDING/freeswitch:bugfix/FS-9536-fix-switch_core_hash_delete-return-invalid to master

* commit '9f01830d':
  FS-9536 [core] fix return value