Announcing network-2.6.3.4

 * Don't touch IPv6Only when running on OpenBSD
   [#227](https://github.com/haskell/network/pull/227)
 * Do not closeFd within sendFd
   [#271](https://github.com/haskell/network/pull/271)
 * Updating examples and docs.

A big thanks to the network contributors.

http://hackage.haskell.org/package/network-2.6.3.4