This shouldn't be needed, as according to the Linux inotify(7) man page,
the entries are supposed to be aligned. It looks like libinotify-kqueue
doesn't respect this and doesn't properly zero-pad the name field.
It's now based on directory monitoring, which is more complicated, but
also much more reliable, especially when dealing with move events and
hard links. It is also closer to the semantics we actually want
(monitoring fs paths for changes, not inodes). It will still get
confused if the directory itself gets moved (directly or indirectly),
though, but handling that correctly is absurdly difficult and not
important for our use-case.
Importantly, FileWatch no longer becomes useless after reporting a
FILEWATCH_FILE_DELETED event: if another file is placed onto the same
path later, the FileWatch will report FILEWATCH_FILE_UPDATED. Some
client logic can be simplified because of that.
