If unable to connect to the XML-RPC server print a more useful error msg.

ipa-admintools/ipa-adddelegation

@@ -31,6 +31,7 @@ import xmlrpclib
 import kerberos
 import krbV
 import ldap
+import errno
 
 def usage():
     print "ipa-adddelgation [-a|--attributes attr1,attr2,..,attrn] [-s|--source STRING] [-t|--target STRING] name"
@@ -113,8 +114,11 @@ def main():
         aci_entry.setValue('aci', new_aci.export_to_string())
 
         client.update_entry(aci_entry)
-    except xmlrpclib.Fault, f:
-        print f.faultString
+    except xmlrpclib.Fault, fault:
+        if fault.faultCode == errno.ECONNREFUSED:
+            print "The IPA XML-RPC service is not responding."
+        else:
+            print fault.faultString
         return 1
     except kerberos.GSSError, e:
         print "Could not initialize GSSAPI: %s/%s" % (e[0][0][0], e[0][1][0])