import exit

The builtin exit function is added by the site package "for the
interactive interpreter" and "should not be used in programs", according
to the manual.

We want sys.exit instead. (I didn't know you could pass it a string
value, but it turns out you can.)

clients/urwid/main.py

@@ -29,6 +29,7 @@ from getpass import getpass
 from subprocess import call
 from random import choice
 from code import interact
+from sys import exit
 import rlcompleter
 import readline
 import tempfile