Misc code style fixes as well:

* Use static functions everywhere, no need to pollute the global namespace
* Rework some function names and variables to use lower case

The new parameter startup-command for gsm spans allows
executing raw AT commands on span startup

Use the new parameter immediate-forwarding-numbers to configure
immediate forwarding logic that emulates hunt groups

The parameter syntax is:

[<span-name>:]<number>

Multiple elements can be specified separated by commas

If the <span-name> is specified, the span will be checked for
availability, if available, its number will be selected for
forwarding, otherwise next number will be checked

Forwarding is enabled as soon as a channel is answered and its
disabled when the channel is hung up

* Add error handing in mod_freetdm for ftdm trace failures

* Allow freetdm signaling modules to specify a destroy function

* Added conditional forwarding to the freetdm gsm module
  Just specify the conditional-forwarding-number gsm parameter in freetdm.conf.xml

* Added new 'gsm call' freetdm command for raw GSM calls which can be
  used to enable/disabling network features (e.g call *93) without
  having to resort to use a full originate that requires routing the
  call somewhere when answered

* Miscelaneous cleanup of piggy coding style left over by one of the
  previous authors -_-

* commit '6c7ed71a':
  update
  update
  fix close file snafu
  update
  commit

* commit '1ee2f0ab':
  add colors to good and bad
  update new pass
  FS-8293 [verto_communicator] - Showing speed in the menu bar if autoBand is true, adding option to test speed before making a call, enabling dedEnc if inboundBandwidth is below dedEncWatermark (3072 by default). FS-8293 [verto_communicator] - Changed info in the top menu bar for a icon+popover, changed autoBand's code in testSpeed method, moved 'Bandwidth settings' to 'Video settings' in settings modal and now hidding video quality selection when autoBand is checked. FS-8293 [verto_communicator] - Better bandwidth info ui. FS-8293 [verto_communicator] - Fixed speed test breaking at splash screen if user isn't logged in.
  Removed unused function.
  FS-8293 [verto_communicator] Implemented speed test in verto communicator.
  always change bw
  tweaks
  WIP not shabby auto vid settings
  first pass, add some funcs to conference and speed test features and fix bugs in ws.c for big payloads

FS-8293 [verto_communicator] - Showing speed in the menu bar if autoBand is true, adding option to test speed before making a call, enabling dedEnc if inboundBandwidth is below dedEncWatermark (3072 by default).
FS-8293 [verto_communicator] - Changed info in the top menu bar for a icon+popover, changed autoBand's code in testSpeed method, moved 'Bandwidth settings' to 'Video settings' in settings modal and now hidding video quality selection when autoBand is checked.
FS-8293 [verto_communicator] - Better bandwidth info ui.
FS-8293 [verto_communicator] - Fixed speed test breaking at splash screen if user isn't logged in.

This reverts commit 8a16ed1a.

Merge pull request #589 in FS/freeswitch from ~SSINYAGIN/freeswitch:bugfix/FS-8530-add-codecs-mod_sangoma_codec-to-avoid_mods to master

* commit '8a16ed1a':
  FS-8530 add codecs/mod_sangoma_codec to avoid_mods in debian/bootstrap.sh

Merge pull request #584 in FS/freeswitch from ~SSINYAGIN/freeswitch:bugfix/FS-8427-incompatible-type-for-ld-in-prinrtf to master

* commit 'de06bf08':
  FS-8427 Incompatible type for %ld in prinrtf

* commit 'b9278a8f':
  FS-8416: Regex feature in param field

Merge pull request #519 in FS/freeswitch from ~MBRANCA/freeswitch:bugfix/FS-8248-python-esl-bindings-are-installed to master

* commit 'f5441a09':
  FS-8248 put python binaries into site arch path

* commit '54be6fc5':
  ESL-111 Fix esl/python/Makefile to create install directory This need when using make install DESTDIR=...

Merge pull request #583 in FS/freeswitch from ~SSINYAGIN/freeswitch:bugfix/FS-8426-freeswitch.pm-is-not-found-by-perl to master

* commit 'ffa24ef6':
  FS-8426 place freeswitch.pm into /usr/share/perl5

Use the buffer length returned by the driver instead of trying to use strlen()

first pass, add some funcs to conference and speed test features and fix bugs in ws.c for big payloads

FS-8400 [verto_communicator] Removing deprecated use of stream.stop(), removing unused code and making volume meter gray so we can see it in a white background

Merge pull request #581 in FS/freeswitch from ~JAONZE/freeswitch:feature/FS-8400-add-camera-and-microphone-preview to master

* commit '522547f8':
  FS-8400 [verto_communicator] Added Camera and microphone preview after the splash screen.

Merge pull request #579 in FS/freeswitch from ~MARCELO1337/freeswitch-fs-8415:feature/FS-8415-send-180-ringing-for-early-media to master

* commit '7c3aed29':
  FS-8415 #resolve [support early with 180 using early_use_180=true]