[Haskell-cafe] ANN: network-2.7.0.2

Announcing network-2.7.0.2 * Removing withMVar to avoid the deadlock between "accept" and "close" [#330](https://github.com/haskell/network/pull/330) * "close" does not throw exceptions. A new API: "close'" throws exceptions when necessary. [#337](https://github.com/haskell/network/pull/337) * Fixing the hang of lazy sendAll. [#340](https://github.com/haskell/network/pull/340) * Installing NetDef.h (#334) [#334](https://github.com/haskell/network/pull/334) Thank you to network contributors for this bug fix release. -- Evan Borden