Signed-off-by: Michael Müller <michael@fds-team.de>

server: Create esync file descriptors for true file objects and use them for directory change notifications.

Just semaphores and mutexes thus far.

We don't have to worry about races because this is just a hint: we still call read() eventually.

The primary function is to check for races. The secondary function is to measure performance.

We don't have to worry about synchronization here because
wine_ntoskrnl_main_loop() is only ever called from one thread per winedevice
process.

This lets drivers like mountmgr finally work, and so winecfg can open the
Drives tab.

This, or something like this, should go upstream. This is invalid behaviour.