Proper detection whether SCTP is available. Do not update player names on configuration change if network client is running.

src/net/win32/socket_startup.cpp

@@ -66,3 +66,9 @@ socket_cleanup()
 	WSACleanup();
 }
 
+bool
+socket_has_sctp()
+{
+	return false; /* no SCTP on Windows */
+}
+