when did u@h limits appear?

["Matus \"fantomas\" Uhlar" <uhlar@xxxxxxxxxxx>]

Hello,

could someone tell me, when did user@host limits appear in ircd ? 
even as patches. I remember there was a patch that did it. but don't know
the ircd version
-- 
 Matus "fantomas" Uhlar, uhlar@xxxxxxxxxxx ; http://www.fantomas.sk/
 Warning: I don't wish to receive spam to this address.
 Varovanie: Nezelam si na tuto adresu dostavat akukolvek reklamnu postu.
 Depression is merely anger without enthusiasm.