DTMF-Source may have the following values:
   APP : injected by application (send_dtmf, etc)
   ENDPOINT : detected by endpoint signaling (like SIP INFO)
   INBAND_AUDIO : detected by start_dtmf, spandsp_start_dtmf, etc
   RTP : detected as 2833/4733 telephone event
   UNKNOWN : unknown source

One possible use of this header is to determine telephone events
are being received, and if so, disable inband detection.

Conflicts:
	src/switch_core_media.c

FS-7396: #resolve update dtls socket when socket changes on auto-adjust that changes address families and also include link local v6 addresses in approrpiate auto acls

* commit 'c7fdcc2a':
  FS-7391 #resolve corrected currency for mod_say_de it's now "Ein Euro und Ein Cent" rather than "Eins Euro und Eins Cent"

FS-7391 #resolve corrected currency for mod_say_de it's now "Ein Euro und Ein Cent" rather than "Eins Euro und Eins Cent"

Merge pull request #207 in FS/freeswitch from ~MBRANCA/freeswitch:bugfix/FS-6954-freeswitch-adds-additional-m-audio to master

* commit 'ca2dd2f3':
  FS-6954 Detect when we have T.38 in nomedia or proxy media mode and apply same fixups as in media mode.

FS-6954 Detect when we have T.38 in nomedia or proxy media mode and apply same fixups as in media mode.

FS-7385 #resolve

* commit 'dee980d2':
  FS-7383 #resolve

FS-7300 [mod_rayo] set iq type to error when prompt component forwards input/output error back to rayo client.

FS-7378 #resolve #comment play_and_detect_speech can now detect DTMF if you set the playback_terminators channel variable to any or specific DTMF.  The result will be stored in speech_detect_result and in playback_terminator_used.  Also added channel variable play_and_detect_speech_close_asr which will release the speech recognition port when the detection is completed.  This will prevent speech licenses from being held the entire call.

Merge pull request #222 in FS/freeswitch from feature/FS-7373-add-ability-to-specify-custom-source.list to master

* commit '4738da13':
  When using the debian/utils.sh script to build FreeSWITCH packages, add the ability to pass -T[path to custom sources path] and -K[custom keyfile path] options to build the FS packages with a custom sources and keyring path.

add the ability to pass -T[path to custom sources path] and -K[custom keyfile path]
options to build the FS packages with a custom sources and keyring path.

FS-7373

FS-7300 #resolve #comment [mod_rayo] handle all MRCP completion causes in SPEECH-COMPLETE event and validate / load input grammar URLs

* commit '7a6303d6':
  Add minimal configuration for configuring FreeSWITCH from scratch

The default "vanilla" configuration that comes with FreeSWITCH has
been designed as a showcase of the configurability of the myriad of
features that FreeSWITCH comes with out of the box. While it is very
helpful in tinkering with FreeSWITCH, it has a lot of extraneous stuff
enabled/configured for use in a production system. This configuration
aims to take the reverse stance -- it attempts to be a starting point
for configuring a new system by "adding" required features (instead of
removing them as one would do if one starts with the default
configuration).

Jira: FS-7362
Source: https://github.com/mx4492/freeswitch-minimal-conf/commit/270941d6f2dca279f1bb8762d072940273d5ae11

FS-7355: don't do the checks for rpl_realloc and rpl_malloc unless it is gcc compiling as autoconf checks for these don't work quite right on clang

* commit '669d6137':
  FS7750: When using the api command group, there is no way to return the contact list separated by :_:, which is required to group call extensions that have been multiply-registered.

Merge pull request #219 in FS/freeswitch from ~SAFAROV/freeswitch-mod-radius-cdr_improvement:erlang-filter to master

* commit '57aba47f':
  FS-7354: Filter feature ported from mod_event_socket to mod_erlang_event

Merge pull request #216 in FS/freeswitch from ~MANAV/freeswitch:doc-switch_core_set_variable to master

* commit '830bc28c':
  FS-7352: Document how to use switch_core_set_variable to delete variables

I had to scan through the source of the function to verify that this
is the indeed the actual behaviour, and that NULL is a valid
argument. By mentioning this in the header, we save posterity that
effort.