Force lowercase gamedirs. Engine doesn't care about gamedir case, so should do master server

pymaster.py

@@ -82,7 +82,7 @@ class PyMaster:
 			try:
 				key = split[i + 1]
 				if( split[i] == 'gamedir' ):
-					gamedir = key
+					gamedir = key.lower() # keep gamedir in lowercase
 				elif( split[i] == 'nat' ):
 					nat = int(key)
 				elif( split[i] == 'clver' ):

server_entry.py

@@ -28,7 +28,7 @@ class ServerEntry:
 				if( split[i] == 'challenge' ):
 					self.challenge2 = int(key)
 				elif( split[i] == 'gamedir' ):
-					self.gamedir = key
+					self.gamedir = key.lower() # keep gamedir lowercase
 				elif( split[i] == 'protocol' ):
 					self.protocol = int(key)
 				elif( split[i] == 'players' ):