Added percent check

Stats-monitoring-in-check_mk_agent.md

@@ -1,5 +1,7 @@
 I've written this extremely simple local check for the check_mk_agent.  If you've installed the agent on your Pi-Hole place this into an executable file wherever your check_mk_agent expects to find local plugins.  Alternatively this could be installed on any system that has access to the Pi-Hole console, I decided to put it on the Pi-Hole directly.  I named mine "mk_pihole_stats.py" but as long as it's in the correct subdirectory and the agent script can execute it it should work just fine.
 
+After you reinventory the client where you installed this you should have two new local checks.  PiHole_ads and PiHole_percent.
+
      #!/usr/bin/python
      # Simple (always OK) check_mk local check to track # of ads blocked today.
      # Since the console/logs rotate everyday, so will the perf data for this
@@ -17,6 +19,8 @@ I've written this extremely simple local check for the check_mk_agent.  If you'v
          json = json.loads(result)
          count = json['ads_blocked_today']
          print "0 PiHole_Ads blocked=" + count + " OK " + count + " ads blocked today."
-    
+         pct = json['ads_percentage_today']
+         print "0 PiHole_Percent percent=" + pct + " OK " + pct + "%."
+
      except:
          print "3 PiHole_Ads Unknown"