Now channel variable is properly set when event is delivered.

Merge pull request #941 in FS/freeswitch from ~RICHARD.SCREENE/freeswitch:feature/FS-9457-mod_http_cache-work-with-azure-blob to master

* commit '55978ba0':
  FS-9457 [mod_http_cache] Allow GET and PUT from Azure Blob Service

Only send final PUT on Azure profiles

Fix core dump when reading Azure key from environment variable

Improve interface between mod_http_cache and storage providers

Remove debug

Remove out-of-date TODO

Add new configuration to example

Changes arising from Christopher Rienzo's comments

Add function to pointers to the profile to allow for better integration with the storage providers.

Add function to pointers to the profile to allow for better integration with the storage providers

Remove old header file inclusion

Merge pull request #944 in FS/freeswitch from ~CRIENZO/freeswitch:fs-9472-originate-retry-timeout to master

* commit '4620f107':
  FS-9472 [core] Add originate_retry_timeout and originate_retry_min_period_ms

* commit 'eb08eef0':
  FS-9480 [mod_kazoo] add api enhancements

* commit '9cd2dbbd':
  FS-9398 solve missing variables in sofia events expire and unregister

Merge pull request #942 in FS/freeswitch from ~SJTHOMASON/freeswitch:bugfix/FS-9466-use-system-md5-if-available to master

* commit '5a2f9d7a':
  FS-9466: Use system MD5 if available

Merge pull request #894 in FS/freeswitch from ~PIOTRGREGOR/freeswitch:bugfix/FS-9143-avmd-fix-custom-headers-in-events to master

* commit '9e0ade83':
  FS-9143 [avmd] #fix event headers

  originate_retry_timeout : maximum duration in seconds to allow retry attempts to occur.
        On expiration, this will not stop an in progress attempt, it will only prevent a
        retry attempt from starting. This value works together with originate_retries.

  originate_retry_min_period_ms : minimum spacing between retry attempts.  This prevents
        retries from flooding an enpoint when it rejects quickly.

- Use system MD5 on BSD and Solaris based platforms
- Use OpenSSL if system library is not available
- Fallback to included APR
- Optimize switch_md5_string()
- replace libsofia MD5 routines in mod_sofia with switch_md5() ones

FS-9466 #resolve

FS-9471 [verto_communicator] Updating In Call display after receiving display update message from mod_verto.

Merge pull request #943 in FS/freeswitch from ~DAVIDL/freeswitch-verto-permission-event:feature/verto-permission-event to master

* commit '5a0e1af5':
  FS-9469 added onGrant/onDenied callbacks in onStream/onError of RTCCallbacks so client code gets notified of webrtc permission change immediately

added onGrant/onDenied callbacks in onStream/onError of RTCCallbacks
so client code gets notified of webrtc permission change immediately

remove whitespace changes

The band filter for G.722 could cause numerical overflow in unusual circumstances with the maximum possiblke signal level. The filter output is now saturated to 16 bits to avoid this.

* commit '16162fd7':
  FS-9404 Handle sequence rollovers in mod_av handling of inbound H.263.

The member can hangup the call while we are playing the outbound announce audio to the agent, this
patch detects this and properly hangup the agent channel to avoid keeping it up with
just a silence call since there's no active bridge.

The agent-bridge-end event now has CC-Agent-Bridged: true if the bridge successfully happens,
variable cc_agent_bridged was added so we can track this in the agent and member CDRs.

If you want to play an audio to the agent to indicate the member hangup the call before the bridge
set the variable cc_bridge_failed_outbound_announce, for example:
<action application="set" data="cc_bridge_failed_outbound_announce=tone_stream://%(250,250,425);loops=3"/>
or
<action application="set" data="cc_bridge_failed_outbound_announce=your-caller-has-gone-away-audio"/>
prior to calling callcenter application.

These variables are documented at https://freeswitch.org/confluence/display/FREESWITCH/mod_callcenter

FS-9442 #resolve #comment tweak the deb packages to properly install the debug symbols via freeswitch-all-dbg and freeswitch-meta-all-dbg lang packages do not have dbg packages as they are just xml

Revert "FS-9442 #resolve #comment tweak the deb packages to properly install the debug symbols via freeswitch-all-dbg and freeswitch-meta-all-dbg"

This reverts commit ccfea718.
this commit needs more work