[Mediawiki-l] Where to find Help pages on setting up required email confirmation of registration?

[Ken McDonald]

I'd like to require new users to verify registration through email, and 
while I know this can be done in MW, I can't for the life of me find any 
help pages, neither by looking on Meta nor with Google searches (though 
I've found lots of similar topics). It'll probably be obvious in 
retrospect, but could someone point out the (or a) help page on this?

Thanks,
Ken