Named URL pattern for admin logout is missing

[Sebastian Rahlf]

I stumbled over this section by accident.

url(r'^$',
  wrap(self.index),
 name='%sadmin_index' % self.name),
url(r'^logout/$',
  wrap(self.logout),
  name='%sadmin_logout'),

Seems that the string substitution for the named URL pattern of the logout link is missing.

[Alex Gaynor]

Marking as a dupe of #10061 since this is solved here, and this fix alone doesn't fix the myriad of problems with logout.