(svn r1108) -Fix: [Network] Fixed problem around slow clients:

They joined, they got the map, but it took some time before the new 
player was created. In this time a player could do stuff, causing a 
player-id-mismatch, and the player was kicked out. Now a player get's a 
nice GUI which says: registering.. When that is gone, the player is 
joined and can play safely. Tnx to Moriarty for bugging me with this bug ;)

network.h

@@ -109,6 +109,7 @@ typedef enum {
 	NETWORK_JOIN_STATUS_WAITING,
 	NETWORK_JOIN_STATUS_DOWNLOADING,
 	NETWORK_JOIN_STATUS_PROCESSING,
+	NETWORK_JOIN_STATUS_REGISTERING,
 
 	NETWORK_JOIN_STATUS_GETTING_COMPANY_INFO,
 } NetworkJoinStatus;