Allow adding connections from other addresses

Forcing a static address does not work for IPv6 where everyone has
multiple addresses that change over time. For example, adding a new
connection would fail if the preferred privacy address changes during
a game.

src/network/C4Network2.cpp

@@ -1236,9 +1236,6 @@ bool C4Network2::CheckConn(const C4ClientCore &CCore, C4Network2IOConnection *pC
 	// check core
 	if (CCore.getDiffLevel(pClient->getCore()) > C4ClientCoreDL_IDMatch)
 		{ *szReply = "wrong client core"; return false; }
-	// check address
-	if (pClient->isConnected() && pClient->getMsgConn()->getPeerAddr() != pConn->getPeerAddr())
-		{ *szReply = "wrong address"; return false; }
 	// accept
 	return true;
 }