This allows you to just Dial(Skinny/line), as long as line isn't ambiguous.
Note that this does not remove or deprecate the "old" syntax, as it's still
quite useful - even moreso if shared lines get implemented.
Initial patch by me, with some changes and suggestions from wedhorn.
(closes issue #10263)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76785 65c4cc65-6c06-0410-ace0-fbb531ad65f3