add example config for service specific override

config/sysalert.ini

@@ -29,3 +29,10 @@ alert_method=sysalert.email
 #mail_to=root <root@localhost>
 smtp_host=localhost
 
+# Specific services can have their own configuration
+# If you have an unstable service that sometimes fails three times
+# before it recovers you can override max_failures for this service
+# by adding a section named after that service:
+#
+#[unstable.service]
+#max_failures=3