Make the difference clear about what the responsibilities of the core and a...

Make the difference clear about what the responsibilities of the core and a spy are when it comes to spying on a channel. The core is responsible for adding a spy to a channel, feeding frames into the spy, removing the spy from the channel, and notifying the spy that is has been detached. The spy is responsible for reading frames in, and cleaning itself up. Each side will not try to do the other's job.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@41959 65c4cc65-6c06-0410-ace0-fbb531ad65f3