FS-11841 [core] The ts of received rtp packages for DTMF is same. so add SFF_RFC2833 flag check when write rtp package.

FS-11896: [core] stop media bugs from being possible to add to channels with no media ready, stop transfer recordings upstream to not try to transfer recordings to channels without media ready

FS-11880: [Core,mod_pgsql] Remove native PostgreSQL support from the core, add mod_pgsql database module.

FS-11893 [core] add switch_dial_handle_create_json() and switch_dial_handle_serialize_json() for dial handle/json conversions

FS-11870 [core, mod_graylog2, mod_console] Added switch_log_node_to_json() and updated mod_graylog2 to use it.  This is a unified log node to JSON conversion.
Added json log mode in mod_console

* also adds a convenience switch_event_channel_deliver for already in thread

FS-11910: [mod_dptools] add native eavesdrop mode. use app native_eavesdrop args <uuid> [read|write]  ... default is read with no flag.  Must be same codecs

FS-11837: [Core] Add feature to allow execution of an app on audio change, execute_on_audio_change variable.

FS-11642: [core] add audio and video versions of the variables set for the rtp_retain_crypto_keys feature

to be consistant with Content-Type at the end of headers if present
dynamically alloc memory to avoid buffer overflow on large message

A request with no body MUST NOT include a Content-Type or any other
MIME-specific header fields.  A request without a body MUST contain
an end-line after the final header field.  No extra CRLF will be
present between the header section and the end-line.

FS-11805 [mod_sofia] set default session timeout for outbound calls before overriding it with NAT detection.