Disallow 'tag' and 'tags' as usernames. Fixes ticket #584
Disallow 'tag' and 'tags' as usernames. Fixes ticket #584

darcs-hash:20080905114534-57fc3-feee793696ddf3d5bbb1ae7f326d9d88dc961e60.gz

xebia/statusnet-oauth2,charlycoste/StatusNet,brion/StatusNet,meitar/laconica,brion/StatusNet,xebia/statusnet-oauth2,bankonme/gnu-social,znarf/statusnet-ladistribution,meitar/laconica,Piratas/tortuga,foocorp/gnu-social,gnusocial/mainline,minmb/statusnet,zh/statusnet,Br3nda/laconica,zh/statusnet,gnusocial/mainline,minmb/statusnet,charlycoste/StatusNet,d3vgru/StatusNet,eXcomm/gnu-social,Piratas/tortuga,bankonme/gnu-social,furtherfield/gnu-social,studio666/gnu-social,eXcomm/gnu-social,zcopley/zcopleys-statusnet-clone,gnusocial/mainline,charnimda/lgbtpzn-social,furtherfield/gnu-social,studio666/gnu-social,zcopley/StatusNet,zh/statusnet,d3vgru/StatusNet,Piratas/tortuga,chimo/social,UngPirat/freesocial,zcopley/zcopleys-statusnet-clone,eXcomm/gnu-social,sikevux/bsk-social,charlycoste/StatusNet,UngPirat/freesocial,zcopley/StatusNet,csarven/statusnet,studio666/gnu-social,xebia/statusnet-oauth2,furtherfield/gnu-social,shashi/StatusNet,d3vgru/StatusNet,znarf/statusnet-ladistribution,Br3nda/laconica,sikevux/bsk-social,foocorp/gnu-social,chimo/social,faulteh/gnu-social,faulteh/gnu-social,zcopley/StatusNet,UngPirat/freesocial,foocorp/gnu-social,charnimda/lgbtpzn-social,faulteh/gnu-social,gnusocial/mainline,eXcomm/gnu-social,sikevux/bsk-social,csarven/statusnet,meitar/laconica,chimo/social,studio666/gnu-social,brion/StatusNet,csarven/statusnet,shashi/StatusNet,znarf/statusnet-ladistribution,faulteh/gnu-social,zcopley/zcopleys-statusnet-clone,bankonme/gnu-social,Piratas/tortuga,csarven/statusnet,bankonme/gnu-social,furtherfield/gnu-social,sikevux/bsk-social,charnimda/lgbtpzn-social,minmb/statusnet,Br3nda/laconica,shashi/StatusNet