Revert "FS-8720: [core] allow passing in blank/null to session::hangup to mean NORMAL_CLEARING hangup cause instead of segfault"
wrong fix for this issue
This reverts commit 3304492b.

* commit '7020d21e':
  FS-8721: avoid memory leak when removing thread-locked bugs

FS-8719: [mod_conference] fix seg when building without video support, but specifying video_mute_png variable for a conference member

FS-8720: [core] allow passing in blank/null to session::hangup to mean NORMAL_CLEARING hangup cause instead of segfault

FS-8715: [mod_sofia] make the oubound_proxy on the profile consistent with how we do the same thing on the gateway

This reverts commit 1746d2eb.

Merge pull request #664 in FS/freeswitch from bugfix/FS-8677-crash-possible-memory-corruption to master

* commit '56a68e3a':
  FS-8677 #resolve [Crash (possible memory corruption) after codec change]

FS-8708 [mod_rayo] fix example configuration to map to correct DETECTED_TONE event from spandsp_start_tone_detect

Merge pull request #663 in FS/freeswitch from ~RA/fs-ra-new:FS-8679-call-completed-elsewhere-2 to master

* commit '507bc265':
  FS-8679: [mod_sofia] no missed call if call is anwered by someone else

sofia is sending Call completed elsewhere to the other involved phones if not disabled by the option ignore_completed_elsewhere

Merge pull request #650 in FS/freeswitch from ~BORDMI/freeswitch:feature/FS-8694-list_users-performance-issue to master

* commit '9cd86722':
  FS-8694 list_users performance issue update

FS-8692 Added functionality to mod_amqp command listener to be able to send the api response back as an event to an exchange defined in the api message headers

Merge pull request #588 in FS/freeswitch from ~ANDEE/freeswitch:bugfix/FS-8432-wrong-timestamp-resolution-in-mpd_amqp to master

* commit '8c540c66':
  FS-8432 fixes timestamp type resolution, adds new header of type uint64 to carry microsecond resolution timestamp

Merge pull request #631 in FS/freeswitch from ~MAFOOUK/freeswitch:bugfix/FS-8648-incorrect-url-s-in-yum-repos to master

* commit 'aad6b0ac':
  FS-8648: incorrect url's in yum repos

Merge pull request #639 in FS/freeswitch from ~GRINDHOLD/freeswitch:bugfix/perl-sendmsg-fix to master

* commit 'c61f6826':
  bugfix: prevented endless loop in sendmsg

Merge pull request #641 in FS/freeswitch from ~SJTHOMASON/freeswitch:bugfix/FS-8666-link-to-mtmalloc-on-solaris-sparc to master

* commit '3c291b3c':
  Use mtmalloc on Solaris SPARC if available