Extension:ConfirmAccount

The ConfirmAccount extension disables direct account creation and requires submission and approval of accounts by bureaucrats. Account creations can be enabled through configuring user rights, such as if you wanted Sysops/Bureaucrats to be able to directly make them.

If installed with the ConfirmEdit extension, captchas can be used to stop flood request.

More will be posted later, still in early stages.

Issues:
 * Name collisions: account creations will be checked and stopped if it collides with a pending name. Requests are checked for pending/account name collisions too.
 * AuthPlugin stuff. If a central login is used, perhaps the database for that can be configured so that all requests go to one table. Otherwise, when accounts are confirmed and made, we may get name collisions.
 * Passwords, hashes may be salted with ids, which request accounts don't yet have. Likely it will have to be emailed to the user. Sites that don't use system emailing will not be able to use this extension likely.