module Uq_libevent: sig .. end
Use Libevent as event loop
This gives (experimental) support for using libevent as event loop.
    To do so, you also need Maas-Maarten Zeeman's bindings for libevent,
    ocaml-event. (N.B. The current name, changed several times, is now
    liboevent.)
    Restrictions:
- ocaml-event is not thread-safe
- There can only be one instance of the event loop at a time
- It is not supported to wait for out of band data
- Signals do not stop the event loop. As a consequence, signals
      are delayed until the next event occurs.
module type LIBOEVENT = sig .. end
module type POLLSET = sig .. end
module Make: 
Instantiate this module.