Some documentation fixes and function call name fixes.

The documentation for taskprocessors was incorrect with
regards to when a listener's alloc callback was called.

I also made the names of queued function calls in the
threadpool more uniform.



git-svn-id: https://origsvn.digium.com/svn/asterisk/team/mmichelson/threadpool@377802 65c4cc65-6c06-0410-ace0-fbb531ad65f3