Properly handle anonymous registrations.

James Moger

2011-10-20 5ae0b71e1e6e73e4bacf321a7d5be49fcdf4ad97

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## Gitblit realm file format: username=password,\#permission,repository1,repository2... 
#Fri Jul 22 14:27:08 EDT 2011 
admin=admin,\#admin,\#notfederated