Fix NPE on ServerChannel.getRemoteAddress

v0.4.3

Releasing 0.4.3

Close connection on CancelledKeyException

v0.4.2

Close connection on CancelledKeyException

Fix CancelledKeyException

Also changed the config callbacks to expose addresses as InetSocketAddress,
instead of the useless SocketAddress base type.

Config options and unit tests

You can now specify a max connection limit and custom runtime rules to allow/block individual requests.

Demote broken connections from error to warning

To avoid diluting the signal to noise ratio on a host system.

Stability improvements & tidy logging output

Dropped the logback dependency and improved connection shutdown logic.

First alpha release

Initial release