FS-9369: [core_media] add_ice_candidates=true var to enable inserting ice candidates in outgoing sdp

Merge pull request #917 in FS/freeswitch from ~SJTHOMASON/freeswitch:bugfix/FS-9386-mod_snmp-needs-lnetsnmphelpers to master

* commit 'a2fd327f':
  FS-9386: [mod_snmp] Use net-snmp-config for SNMP libs if available

FS-9386 #resolve

Merge pull request #916 in FS/freeswitch from ~PROWLAH/freeswitch:Improvement/FS-9385-check-ghosts-before-conf-destroy to master

* commit '3227b021':
  do not destroy conference if ghost(s) are present, add ghost count check before setting flag

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.