Small updates to 1.19 lag plugin logic

- Use the 5-minute average instead of the 1-minute average; although the
  1.7 version using the LagMeter plugin only offers 1-minute so this
  is something of a behavioral change, the 5-minute average is better
  suited to the 5-minute resolution normally offered by Munin.
- Account for the asterisk that can appear in the 1.19 output to
  indicate a tick rate higher than 20.0, but continue to treat it as
  20.0.

Change-Id: I6673804bb6fb3af50f339121279e0454e81601e2

Author: FastLizard4

minecraft_lag.php

@@ -34,7 +34,7 @@
 	echo "graph_title " . ((empty($_ENV['customTitle'])) ? "Minecraft Server Lag" : $_ENV['customTitle'] . " Server Lag") . "\n";
 	echo "graph_vlabel Ticks per second (TPS)\n";
 	echo "graph_category minecraft\n";
-	echo "tps.label Actual TPS (1-minute average)\n";
+	echo "tps.label Actual TPS (5-minute average)\n";
 	echo "tps.colour ff0000\n";
 	echo "normal.label Normal TPS\n";
 	echo "normal.colour 0fc20f\n";
@@ -52,8 +52,8 @@
 	$data = dataPlz("tps");
 	$data = preg_replace('/§./', '', $data);
 
-	if (preg_match('/TPS from last 1m, 5m, 15m: ([0-9.]+), ([0-9.]+), ([0-9.]+)/', $data, $matches)) {
-		$tps = str_replace(',', '', $matches[1]);
+	if (preg_match('/TPS from last 1m, 5m, 15m: ([0-9.]+)\*?, ([0-9.]+)\*?, ([0-9.]+)\*?/', $data, $matches)) {
+		$tps = str_replace(',', '', $matches[2]);
 
 		echo "tps.value {$tps}\n";
 		echo "normal.value 20.00\n";