When a symlink to a direcotry is deleted inotify cannot tell it from a
regular file rendering all its children orphans.
This sometimes leads to an unexpected effect - they may appear later in
a newly created directory when it gets an id used by the deleted symlink.
specific code to monitor_inotify.c.
Both monitor_inotify.c and monitor_kqueue.c provide their functions
for adding and removing watches. Prefix these functions with monitor_.
