FS-8898 log setVariable at debug, so you can tell what variables are being set with ease from scripts

Merge pull request #733 in FS/freeswitch from ~TCSEKE/freeswitch:bugfix/FS-8866-mod_erlang_event-memleak to master

* commit '0914a501':
  Fix memory leaks

Merge pull request #737 in FS/freeswitch from ~CARLOSP/freeswitch:bugfix/FS-8910-sdes-not-properly-negotiated-when to master

* commit '8fa947aa':
  FS-8910: Properly negotiate SDES when receiving SDP with a=crypto:0

Merge pull request #735 in FS/freeswitch from ~DCOLOMBO/freeswitch:bugfix/FS-8911-fix-typo-in-conference_member to master

* commit '3e9e2398':
  FS-8911: fix typo in conference_member

When receiving an SDP with a=crypto:0 with the wanted crypto suite, we should
maintain that crypto tag in the local SDP in order for SDES setup to succeed.

Merge pull request #722 in FS/freeswitch from ~DRAGOS_OANCEA/freeswitch-dragos:mod_amr-octet_aligned to master

* commit '8dcf8caa':
  FS-8878: mod_amr: make AMR NB transcode in octet-align mode (when compiled with HAVE_AMR)

Destroy session event hash and events in queue
FS-8866 --resolve