Add new functionality to http server that requires manager authentication for...

Add new functionality to http server that requires manager authentication for any path that includes a directory named 'private'. This patch also 
requires manager authentication for any POST's being sent to the server as well to help secure uploads.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@118161 65c4cc65-6c06-0410-ace0-fbb531ad65f3