Merge pull request #1624 in FS/freeswitch from ~VLADIMIR.RALEV/freeswitch:bugfix/FS-10534-dont-crash-on-dead-channel-in-loopback to master

* commit 'ad2344cb':
  FS-10534 [mod_loopback] Add null pointer check to avoid crashing loopbacks

Merge pull request #1647 in FS/freeswitch from ~NETOGUIMARAES/freeswitch:fix/remove_default_value to master

* commit 'fd7c6a8a':
  FS-11589 [verto_communicator]: removing es6 use to support old browsers syntax

https://freeswitch.org/jira/browse/FS-11521

* commit '85cfd5b5':
  FS-11584: [verto_communicator] make user able to login using url params

Merge pull request #1643 in FS/freeswitch from FSA/freeswitch-advantage:FS-11583-fix-crash-in-reg-event-handler to master

* commit '604690b5':
  FS-11583 [mod_sofia] fix crash when missing address in register event

Merge pull request #1642 in FS/freeswitch from FSA/freeswitch-advantage:andrey-fsa-to-public-master to master

* commit 'd0cca7e2':
  FS-11555: [mod_signalwire] Initial commit.
  FS-11565: [Build-System] Add 48kHz sounds to the Visual Studio solution on Windows.
  FS-11547: [core] Fix broken record_sample_rate variable.

* commit 'ffc4a6e3': (23 commits)
  FS-11487 convert tests to Makefile.am
  FS-11569 add rate to null endpoint
  FS-11505: [core] System call with output capture on Linux and Windows without fork. Add switch_core test.
  FS-11455 add switch_utils test
  FS-11442 [test] enable module runtime when loading it
  FS-11442 [test] add fst_check_extension_apps to compare dialplan apps with expected.
  FS-11442 [test] Fix double-free on test suite cleanup.
  FS-11487 #resolve convert to Makefile.am
  missing comma
  FS-11461: [mod_av] Add test code, improve tests on Windows.
  FS-11461: [core] Fix mod_av test code on Windows.
  FS-11453 [core] remove dependency to libtap for unit tests                 move all core unit tests to tests/unit
  FS-11455 #resolve add originate test for state handlers
  FS-11453 [mod_rayo] convert to fst testing
  FS-11453 [mod_rayo] allow text/plain grammar for non-mrcp speech recognizers.  Added direction to output component to assist with testing.  Fix confidence conversion to NLSML.
  FS-11453 [mod_rayo] add support for FS JSON ASR result.
  FS-11442 [mod_test] new module, mod_test - mock ASR interface.
  FS-11442 [core] allow multiple test modules to be loaded in the same test program.
  FS-11442 [core] Add test helpers for wall time measurements and integer/double range checks.  Improve simple test log output to identify which test the failure is in.
  FS-11442 [core] added test helpers for constructing XML objects
  ...

FS-11505: [core] System call with output capture on Linux and Windows without fork. Add switch_core test.

fix regression from 53533118cd7eedf7d25a9c6227558736fa5d0b2f

https://freeswitch.org/jira/browse/FS-11465

                move all core unit tests to tests/unit

FS-11453 [mod_rayo] allow text/plain grammar for non-mrcp speech recognizers.  Added direction to output component to assist with testing.  Fix confidence conversion to NLSML.

FS-11442 [core] Add test helpers for wall time measurements and integer/double range checks.  Improve simple test log output to identify which test the failure is in.