don't automatically create the administrator@ alias (e.g. on first user creation) because we dont know what it should be an alias to (leave this to be resolved manually), fixes #470
don't automatically create the administrator@ alias (e.g. on first user creation) because we dont know what it should be an alias to (leave this to be resolved manually), fixes #470

Was broken by 462a79cf47e038325ca69f7ac84d7fe097154061.

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