biolimit: max character length of bio; 0 means no limit; null means to use
the site text limit default.
+backup: whether users can backup their own profiles. Defaults to true.
+restore: whether users can restore their profiles from backup files. Defaults
+ to true.
+delete: whether users can delete their own accounts. Defaults to true.
+move: whether users can move their accounts to another server. Defaults
+ to true.
newuser
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