Improve log output on incoming connection

To ease the analysis of connection problems when working with multiple sessions/ports/log files it would be handy if there was a little more information given in one log line. This is especially necessary when grepping over multiple log files.

On an incoming connection the output is currently:
MINA session created: /10.0.173.12:12345
(this is the remote address)

But should be something like:
MINA session created: local=/10.0.173.12:23456, class org.apache.mina.transport.socket.nio.SocketSessionImp, remote=/10.0.173.12:12345
(this is more similar to the InitiatorIoHandler class)