Manual:$wgUserrightsInterwikiDelimiter

User accounts, authentication: $wgUserrightsInterwikiDelimiter
Character used as the separator between username and database name on Special:UserRights.
Introduced in version:1.15.0 (r48765)
Removed in version:still in use
Allowed values:(string)
Default value:'@'

DetailsEdit

Character used as a delimiter when testing for interwiki user rights (In Special:UserRights, it is possible to modify users on different databases if the delimiter is used, e.g. Someuser@enwiki).

It is recommended that you have this delimiter in $wgInvalidUsernameCharacters , or you will not be able to modify the user rights of those users via Special:UserRights.

See alsoEdit