Add a verbose flag

The `--verbose` flag turns on verbose logging in the Python logging
module.  This may be used by drivers (such as k5test) to output
extra information.

Author: DirectXMan12

gssapi-console.py

@@ -8,6 +8,7 @@
 import os
 import sys
 import copy
+import logging
 
 import pkg_resources as pkgres
 
@@ -31,10 +32,16 @@
                     default=None, dest='attach',
                     help='Attach to an existing gssapi-console environment, '
                          'indicated by IDENTIFIER.')
+parser.add_argument('-v' , '--verbose', default=False, action='store_const',
+                    dest='verbose', const=True,
+                    help='Use a more verbose logging level')
 
 
 PARSED_ARGS = parser.parse_args()
 
+if PARSED_ARGS.verbose:
+    logging.basicConfig(level=logging.DEBUG)
+
 realm_args = {}
 if PARSED_ARGS.realm_args:
     for arg in PARSED_ARGS.realm_args.split(','):