use a delimiter for 'show channels concise' that will not appear in the field...

use a delimiter for 'show channels concise' that will not appear in the field contents (issue #6086, with UPGRADE.txt addition)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@10085 65c4cc65-6c06-0410-ace0-fbb531ad65f3