Better status messages from check_ping_multiaddr.

Give understandable status messages for the IP addresses reported,
not just the status codes.

check_ping_multiaddr.py

@@ -223,12 +223,12 @@ def main(argv):
     (alive, unreachable, not_reported, unexpected) = \
         ping_addresses(addresses)
 
-    # XXX: Better messages
     ping_statuses = {
-        'OK':       map(str, alive),
-        'WARNING':  map(str, unexpected),
-        'CRITICAL': map(str, unreachable),
-        'UNKNOWN':  map(str, not_reported),
+        'OK':       [ '%s is alive' % (ip,) for ip in alive ],
+        'WARNING':  [ '%s was reported despite not being pinged' % (ip,)
+                      for ip in unexpected ],
+        'CRITICAL': [ '%s is unreachable' % (ip,) for ip in unreachable ],
+        'UNKNOWN':  [ '%s has no information' % (ip,) for ip in not_reported ],
     }
     lvl,message = trh_nagioslib.nagios_report(ping_statuses)
     sys.stdout.write(message)