Make app_queue AMI events more consistent. Give Join/Leave more useful names.

This also removes the eventwhencalled and eventmemberstatus configuration
options.  These events can just be filtered via manager.conf blacklists.

(closes issue ASTERISK-21469)
Review: https://reviewboard.asterisk.org/r/2586/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@390901 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/queues.conf.sample

@@ -475,20 +475,6 @@ monitor-type = MixMonitor
 ; loose - penalty,invalid
 ;
 
-; If this is set to yes, the following manager events will be generated:
-; AgentCalled, AgentDump, AgentConnect, AgentComplete; setting this to
-; vars also sends all channel variables with the event.
-; (may generate some extra manager events, but probably ones you want)
-;
-; eventwhencalled = yes|no|vars
-;
-; If this is set to yes, the following manager events will be generated:
-; QueueMemberStatus
-; (may generate a WHOLE LOT of extra manager events)
-; The default value is yes and this can not be set globally.
-;
-; eventmemberstatus = no
-;
 ; If you wish to report the caller's hold time to the member before they are
 ; connected to the caller, set this to yes.
 ;