Added GSLT support

As per #560

GarrysMod/gmodserver

@@ -3,7 +3,7 @@
 # Server Management Script
 # Author: Daniel Gibbs
 # Website: http://gameservermanagers.com
-version="121215"
+version="161215"
 
 #### Variables ####
 
@@ -31,9 +31,14 @@ clientport="27005"
 ip="0.0.0.0"
 updateonstart="off"
 
+# Optional: Game Server Login Token
+# GSLT can be used for running a public server.
+# More info: http://gameservermanagers.com/gslt
+gslt=""
+
 # https://developer.valvesoftware.com/wiki/Command_Line_Options#Source_Dedicated_Server
 fn_parms(){
-parms="-game garrysmod -strictportbind -ip ${ip} -port ${port} +host_workshop_collection ${workshopcollectionid} -authkey ${workshopauth} +clientport ${clientport} +tv_port ${sourcetvport} +gamemode ${gamemode} +map ${defaultmap} +servercfgfile ${servercfg} -maxplayers ${maxplayers}"
+parms="-game garrysmod -strictportbind -ip ${ip} -port ${port} +host_workshop_collection ${workshopcollectionid} -authkey ${workshopauth} +clientport ${clientport} +tv_port ${sourcetvport} +gamemode ${gamemode} +map ${defaultmap} +sv_setsteamaccount ${gslt} +servercfgfile ${servercfg} -maxplayers ${maxplayers}"
 }
 
 #### Advanced Variables ####