Network server library to handle
over 10,000 connections. Since GHC 6.12 or
earlier uses select(), it cannot handle
connections over 1,024. This library uses
the prefork technique to get over the barrier.
Programs complied by GHC 6.10 or earlier
with the -threaded option kill the IO thread
when forkProcess is used. So, don't specify
the -threaded option to use this library.