[Haskell] sendfile-0.4 released: sockets and freebsd and docs oh my!

sendfile-0.4: http://hackage.haskell.org/package/sendfile -------------------------------------------------------------------------------- * FreeBSD support contributed by Maxime Henrion (untested!) * sendFile is now unsafeSendFile (continued support for a Handle as the output) * sendFile' is now unsafeSendFile' (continued support for a Handle as the output) * sendFile and sendFile' now take a Socket as the output instead of a Handle in order to be more semantically correct and typesafe (a Handle used for the output which was not created from a Socket will cause runtime errors). Thanks to Johan Tibell for this discussion. * documentation extended / improved Regards, Matthew Elder