CHANGES:

• Previously if the client closed the connection while cohttp was handling a request, the server would crash (by default, unless the user overrode that using on_exn or changing Lwt's async exception handler). Now, cohttp will just log this at info level and continue. Exceptions produced by user code are logged as errors, while other exceptions generated by cohttp call back to the conduit exception handler, as before. (#669 @talex5)