Fixed #3165 -- Really allow underscores when making a superuser, thanks `SmileyChris`.
Fixed #3165 -- Really allow underscores when making a superuser, thanks `SmileyChris`.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%407018

Belgabor/django,Belgabor/django,Belgabor/django