FS-7425: #resolve dhparams might not be present, causing a seg.  Make sure they are there before we apply them

FS-7526: add enable_fallback_format_fields for mod_amqp producer profiles if the profile param is set.

FS-7496 Updated mime.types, added switch_core_mime_type2ext function and used it in mod_httapi.  Now, file extensions defined in mime.types will be applied if mod_httapi downloads a file without one.

FS-7491 #resolve #comment [mod_graylog2] send timestamp with millisecond precision instead of microsecond as required by GELF.

FS-7490 #resolve #comment mod_rayo, srgs to regex transform: latest PCRE doesn't like regex generated by mod_rayo.  It requires the group name not to start
with a digit.

Merge pull request #199 in FS/freeswitch from ~ARTURZ/freeswitch:FS-7307-native-recording-buffering to master

* commit '8e72fafb':
  FS-7307: When recording a call in native format, buffering does not work

This reverts commit 702f0472.

Merge pull request #234 in FS/freeswitch from feature/FS-7435-enable-auto-detection-of-libpq-for to master

* commit '702f0472':
  FS-7435 change pgsql support to default on, with an option to disable

* commit '638e9324':
  FS-7434 reset jitter buffer when SSRC changes