This changes how we create the temporary directory /run/freeswitch
when starting FS with systemd.  The /run directory starts empty after
a system reboot, so we need to ensure this directory is present.

As part of systemd.exec(5), systemd provides a mechanism to
automatically manage these directories under /run and to bind their
lifetime to the lifetime of the process.

This commit moves to using the RuntimeDirectory= mechanism and removes
the obsolete ExecStartPre/mkdir code.

FS-7130

FS-8042, FS-8182: add ping time (in ms) to sip_registrations table, displays as part of the show commands that show registration details, add force_ping=true user var to force options ping on individual registered endpoints

FS-8185: [core] Allow xml preprocessor to expand variables where the resulting value is much longer than the original size

FS-8167 [mod_lua] Fixed a segfault caused by using api:execute or session:execute and not quoting the first argument like api:execute(log, “Second argument”) instead of api:execute(“log”, “Second argument”)

FS-8175 #resolve [Add continue_on_answer_timeout variable to allow channel to proceed from a tripped answer timeout]

Don't delete spawn reply because it can cause segfault in strncmp, check the flag instead

Prevent users to change password to an empty password when
allow-empty-password-auth is set to true.

FS-1772: [mod_voicemail] fix reset of voicemail greeting to default to allow entering 0 to restore the default greeting.

FS-8143 #resolve #comment [mod_rayo] Fix crash caused by client disconnecting from mod_rayo while a message is being delivered to that client.
This is caused by the XMPP context's JID -> XMPP stream mapping not being cleaned up on XMPP stream destruction.

Since using SWIG 2.0 to generate the code, two new items have been
pushed on the stack. Use relative stack indices to avoid breakage.

FS-8099 #resolve

Merge pull request #243 in FS/freeswitch from ~ARTURZ/freeswitch:FS-7486-broken-sofia-request-queue to master

* commit '074b07f5':
  FS-7486: Fix handling of queued requests in Sofia-SIP

Merge pull request #475 in FS/freeswitch from ~ARTURZ/freeswitch:FS-8142-switch_core_session-thread-cache-races to master

* commit 'cd4c3188':
  FS-8142 Fix a thread cache thread-safety and caching

Merge pull request #474 in FS/freeswitch from ~ARTURZ/freeswitch:FS-8141-add-apr_queue_term to master

* commit '9e29ea01':
  FS-8141 Add support for apr_queue_term() to switch_apr.c

FS-7135: [mod_sofia] fix response to re-invite with duplicate sdp (such as we get from seesion refresh) when soa is disabled to include an sdp.  Fixes t.38 fax failure on session refresh

FS-7903 #resolve [proxy_media gives Codec PROXY Exists but not at the desired implementation. 0hz 0ms 1ch]

 - Fix record-name event missing VM-Name-Path
 - Fix verbose events for mod_voicemail 'folder-summary'
 - Send change-password event in mod_voicemail
 - Fix verbose events for mod_voicemail 'leave-message'

* commit 'd5d45173':
  FS-7912: [mod_conference] fix for v1.4 branch to not allocate for conference cdr if conference cdr is disabled

FS-8110 #resolve #comment [mod_rayo] prompt IQ error reply was being deleted after being sent for delivery.  This is incorrect since message delivery thread will clean up the message.

FS-8103 #resolve #comment [mod_rayo] handle <prompt> where <output> finishes unexpectedly before start event is received

FS-7752 [mod_rayo] increase maximum number of <tag> elements from 30 to 1024.  This allows adhearsion to create large grammars to navigate IVR menus.

FS-7912: [mod_conference] fix for v1.4 branch to not allocate for conference cdr if conference cdr is disabled

FS-8047: [build] fix build errors in mod_oreka, and mod_sangoma_codec due to using __FUNCTION__ on newer compilers