Update documentation for leastrecent strategy.

In queues.conf.sample the leastrecent strategy was incorrectly described. Now updated
to reflect how the strategy actually checks peers.

(closes issue ASTERISK-17854)
Reported by: Sebastian Denz
Patches:
     queues.conf-doc_issue.patch (License #6139)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@343047 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/queues.conf.sample

@@ -83,7 +83,7 @@ monitor-type = MixMonitor
 ; A strategy may be specified.  Valid strategies include:
 ;
 ; ringall - ring all available channels until one answers (default)
-; leastrecent - ring interface which was least recently called by this queue
+; leastrecent - ring interface which was least recently hung up by this queue
 ; fewestcalls - ring the one with fewest completed calls from this queue
 ; random - ring random interface
 ; rrmemory - round robin with memory, remember where we left off last ring pass