Call Parking: Set PARKINGLOT and PARKINGSLOT variables on all parked calls

These two variables were previously not being set when comebacktoorigin=yes
and the example configs seemed to imply that they should be. Since there
is no harm in this and since calls that are sent back to origin are capable
of continuing in the dialplan, this seemed like a no-brainer. Also it
supports some bridging tests I've been working on.


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@381068 f38db490-d61c-443f-a65b-d21fe96a405b
app_confbridge: Fix crash from receiving an AMI action after ConfBridge unloaded.

Unloading ConfBridge caused the next AMI action received to crash
Asterisk.

* Add the missing unregister of AMI action ConfbridgeSetSingleVideoSrc
when ConfBridge is unloaded.

(closes issue ASTERISK-20994)
Reported by: Jeremy Kister
Patches:
      jira_asterisk_20994_v11.patch (license #5621) patch uploaded by rmudgett
Tested by: Rusty Newton, Jeremy Kister
........

Merged revisions 381067 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@381069 f38db490-d61c-443f-a65b-d21fe96a405b