'domain_alias' config object XML help doesn't make it clear that the name used...

'domain_alias' config object XML help doesn't make it clear that the name used for the object is the domain alias

(issue ASTERISK-22114)
(closes issue ASTERISK-22114)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@396901 65c4cc65-6c06-0410-ace0-fbb531ad65f3