[ceph] prevent from removing monitor on itself

ceph/ceph-mon-stop-delete

@@ -1,11 +1,12 @@
 #!/bin/sh
 
-if [ $# -ne 0 ]; then
-    echo "$0 (no arguments"
+if [ $# -ne 1 ]; then
+    echo "$0 <monitor>"
+    echo "f.i. $0 serverX"
     exit 1
 fi
 
-mon=mon.$(hostname)
+mon=mon.$1
 
 # Starting with monit, if available
 if [ -e /etc/monit ]; then