add dummy check named hello

hello

+#!/bin/bash
+# ======================================================================
+#
+# Dummy check - just send OK
+#
+# This is default check for non reachable hosts in private networks.
+# It can be defined as a check in global zone to be deployed to 
+# sattelite nodes.
+#
+# ----------------------------------------------------------------------
+# 2021-06-04  v1.0  <axel.hahn@iml.unibe.ch> hello :-)
+# ======================================================================
+
+. `dirname $0`/inc_pluginfunctions
+ph.status "Here I am!"
+ph.exit
+
+# ----------------------------------------------------------------------

readme.md

@@ -53,3 +53,4 @@ There is one include script used by all checks:
 * check_systemdservices
 * check_timesync
 * check_uptime
+* hello