On passing remove presumably duplicate code to generate
the message for the manager_hooks:

in the previous version, the message was almost the same as the one sent
to regular sessions, with the exception of the empty line at the end, and
a few (presumably unintentional) differences e.g.  timestamps,
debugging, and lowercase headers for "event" and "privilege".

now we reuse the same message as before.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48553 65c4cc65-6c06-0410-ace0-fbb531ad65f3