inotify: process all inotify events in one batch
When several inotify events happen, we don't have to process each event
separately, calling everytime repowatcher.read_events() to fetch events from
the underlying watcher: it is sufficient to call once read_events, to fetch
all the events from the watcher.
%% Should show unknown
? unknown
removing b
%% Should show unknown and b removed
R b
? unknown
%% Should show a and unknown
a
unknown