server: Initial inotify support.

[Mike McCormack]

Hans Leidekker wrote:

>>This isn't ready yet because it cause a regression test to fail.  The
>>failure is related to calling RemoveDirectory on an open directory
>>handle, so isn't a fault in this code.
> 
> You must be referring to my evil change notification test here?

Yeah, that's the one.  Good test! :)  It's not failing because we don't 
get a change notification though; it's failing because Wine won't delete 
a directory that's open.

I actually have a test that shows the same problem in the ntdll version 
of the notify tests, but that one doesn't pass yet, so I wasn't forced 
to solve the problem like I am here :)  The kernel change test currently 
passes because file change notifications work the wrong way - they don't 
require you to have an open directory handle to get notifications, so it 
avoids the delete-with-open-handle problem.

> Another interesting case that I didn't test would be moving a directory
> that has change notifications registered for it. I see you don't map
> IN_MOVE_SELF, which would allow us to detect this case. Any particular
> reason for that?

First I need to allow deleting directories that have an open handle, 
then I can make the test work, and IN_MOVE_SELF/IN_DELETE_SELF are 
probably what's needed.

Mike