(svn r8631) -Add: added parameter -l ip[:port] to ./openttd, which redirects DEBUG() to a remote connection over TCP

For example, launch on 192.168.0.1 with, say, netcat a listener: netcat -l -p 3982
  Launch OpenTTD on a remote host (say, PSP): ./openttd -l 192.168.0.1 -d9
  And you get all debug information on 192.168.0.1. Very useful for debugging Portable systems.

src/network/core/config.h

@@ -17,6 +17,7 @@
 enum {
 	NETWORK_MASTER_SERVER_PORT    = 3978, ///< The default port of the master server (UDP)
 	NETWORK_DEFAULT_PORT          = 3979, ///< The default port of the game server (TCP & UDP)
+	NETWORK_DEFAULT_DEBUGLOG_PORT = 3982, ///< The default port debug-log is sent too (TCP)
 
 	SEND_MTU                      = 1460, ///< Number of bytes we can pack in a single packet