fsnotify/inotify split

The following two patches simply split fsnotify from inotify. There should be no functional change to inotify at all. Perhaps the split will help identify the interface bits that can easily converge for inotify and audit. They're completely untested... I started with inotify-45 in 2.6.13-rc2-mm1, and worked against base 2.6.13-rc2.

My first pass was trivial split, this is my second pass which moves dnotify and inotify functionality out of fsnotify.h into their respective corners. I'm sure audit can at least use the hooks, and perhaps more base inode watch functionality could be shared (at no cost to you! ;-) moving forward.

thanks,
-chris