[Mediawiki-l] Control User Registrations

[Ira Goldstein]

I know that by setting "$wgWhitelistEdit = true;" in LocalSettings.php I can limit edits to registered users.  However, we have a need to control new accounts.  Is there a way to allow just sysops to create user accounts for others?  Ideally the special page "Create an account or log in" would be split into a "log in" page available to anyone and a "Create an account" page available only to sysops.

Any help would be appreciated.
Thanks
--Ira