[1.2.X] Fixed #14391 - Updated django-admin.1 man page to include newer...

[1.2.X] Fixed #14391 - Updated django-admin.1 man page to include newer commands. Thanks to laurentluce for the patch.

Backport of [14120] from trunk

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14121 bcc190cf-cafb-0310-a4f2-bffc1f526a37