refactor(dayzserver): cleaner reading of server variables

lgsm/functions/info_game.sh

@@ -364,11 +364,11 @@ fn_info_game_dayz(){
 		serverpassword="${unavailable}"
 		maxplayers="${zero}"
 	else
-		servername=$(grep "hostname" "${servercfgfullpath}" | sed -e 's/^[ \t]*//g' -e '/^\//d' -e 's/hostname//g' | tr -d '=\";,:' | sed -e 's/^[ \t]*//' -e 's/[ \t]*$//')
-		adminpassword=$(grep "passwordAdmin" "${servercfgfullpath}" | sed -e 's/^[ \t]*//g' -e '/^\//d' -e 's/passwordAdmin//g' | tr -d '=\";,:' | sed -e 's/^[ \t]*//' -e 's/[ \t]*$//')
-		serverpassword=$(grep "password" "${servercfgfullpath}" | sed -e 's/^[ \t]*//g' -e '/^\//d' -e 's/password//g' | tr -d '=\";,:' | sed -e 's/^[ \t]*//' -e 's/[ \t]*$//')
-		maxplayers=$(grep "maxPlayers" "${servercfgfullpath}" | grep -v "//" | tr -cd '[:digit:]')
-		queryport=$(grep "steamQueryPort" "${servercfgfullpath}" | grep -v "//" | tr -cd '[:digit:]')
+		servername=$(sed -nr 's/^hostname\s*=\s*"(.*)"\s*;/\1/p' "${servercfgfullpath}")
+		adminpassword=$(sed -nr 's/^passwordAdmin\s*=\s*"(.*)"\s*;/\1/p' "${servercfgfullpath}")
+		serverpassword=$(sed -nr 's/^password\s*=\s*"(.*)"\s*;/\1/p' "${servercfgfullpath}")
+		maxplayers=$(sed -nr 's/^maxPlayers\s*=\s*([0-9]+)\s*;/\1/p' "${servercfgfullpath}")
+		queryport=$(sed -nr 's/^steamQueryPort\s*=\s*([0-9]+)\s*;/\1/p' "${servercfgfullpath}")
 
 		# Not Set
 		servername=${servername:-"NOT SET"}