Set username to default to the category name if it isn't overridden by a...

Set username to default to the category name if it isn't overridden by a usernmae= setting in users.conf


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@105733 65c4cc65-6c06-0410-ace0-fbb531ad65f3