fix(cod4): Improve servername and rcon password parsing (#3564)

* fix(cod4): Improve servername and rcon password parsing

* further improvements to info_game

Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>

Author: h3o66

lgsm/config-default/config-lgsm/pstbsserver/_default.cfg

@@ -14,7 +14,6 @@ port="10027"
 queryport="10037"
 rconport="21114"
 randommap="NONE"
-#servername="LinuxGSM Server"
 maxplayers="40"
 reservedslots="0"