The restart button made the network game use the wrong configuration (it created a new controller), now it uses the current game configuration (and controller). It restarted the chat and sent again the nick, now it is not needed and is not done.

I have introduced, I needed it desperately, the name of the message interchanged as an XML attribute (totally backwards compatible). in protocol.cpp and message.h

Lots of network games against myself (and some local games against AI too).
Place half the ships to see if it was possible to start to shoot too soon, make one of them unable to finish placing the remaining ships several times, then finish it... waiting for the opposite to finish placing ships. Do the same with the other player.. Start shooting (some times finishing the game), and then press restart.