Add the ability to pass options to the Dial application when using the DUNDi

switch in the dialplan by setting the DUNDIDIALARGS channel variable.
(issue #8084, patch by bluecrow76, with small modifications and documentation
updates)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@46781 65c4cc65-6c06-0410-ace0-fbb531ad65f3