This is part 2/2 of the patches for #7090. Adds one-step call parking to...

 This is part 2/2 of the patches for #7090. Adds one-step call parking to /trunk via builtin functions and 'k' 'K' application options added to app_dial. This also resolves #6340.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@29467 65c4cc65-6c06-0410-ace0-fbb531ad65f3