Merge pull request #911 in FS/freeswitch from ~THEHUNMONKGROUP/freeswitch:feature/FS-9230-customize-video-muted-banner to master

* commit '14f9b576':
  FS-9230: Customize video muted banner

Allows customizing the banner displayed when video is muted, via conference
param 'video-mute-banner' per conference, or channel var 'video_mute_banner'
per user.

Foreground/background colors, font face/size, and text can all be customized.

* commit '0df7e787':
  FS-9355: fix segfault in case of null frame

FS-9342 - [verto_communicator] Properly saving settings to localStorage when closing the settings panel.

This reverts commit cf610796.

* commit 'cf610796':
  Fix for FS-9313

Merge pull request #886 in FS/freeswitch from ~MGROOMS/freeswitch-matthew:bugfix/detect_audio_silence to master

* commit '6c3710df':
  FS-9264: Introduce two new api calls named detect_audio and detect_audio_silence. The existing wait_for_silence call never actually waits for silence until it first detects non-silence. There is also no way to set an independent timeout for detecting both the non-silence and then silence. This causes problems when wait_for_silence is called on an already quiet channel. Splitting the function up into two separate calls with separate timeouts offers more flexibility.

Merge pull request #909 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:bugfix/FS-9009-windows-warning to master

* commit 'd49b66c9':
  FS-9009 [mod_avmd] #fix warning on Windows

Initialize variance of amplitude - avoid (incorrect) warning

Merge pull request #908 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:bugfix/FS-9009-fix-windows-build to master

* commit '6d614ac1':
  FS-9009 [mod_avmd] #fix build on Windows

Windows VC doesn't accept function __attribute__(s)

Merge pull request #900 in FS/freeswitch from feature/FS-9310-native-support-for-flowroute-sms to master

* commit '35b816bb':
  FS-9310 Native support for Flowroute SMS API over HTTP(S)

* commit 'f6192c79':
  FS-9241: follow-up patch to fix a mistake in fetching profile url

* commit '78c2ed05':
  FS-9241 Use tls_public_url instead of tls_url in INVITE Contact when NAT is detected

Merge pull request #904 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:feature/FS-9009-avmd-amplitude-estimation to master

* commit 'a7738745':
  FS-9009 [mod_avmd] Amplitude estimation

Add DESA-2 estimation of signal amplitude

* commit '9988d8d9':
  FS-9278: sending sendonly instead of sendrecv media attribute in SDP when unholding call when Zoiper softphone had responded with inactive

FS-9278: sending sendonly instead of sendrecv media attribute in SDP when unholding call when Zoiper softphone had responded with inactive