Changes with nginx 0.7.22                                        20 Nov 2008
    *) Feature: the "none" parameter in the "smtp_auth" directive.
       Thanks to Maxim Dounin.
    *) Feature: the "$cookie_..." variables.
    *) Bugfix: the "directio" directive did not work in XFS filesystem.
    *) Bugfix: the resolver did not understand big DNS responses.
       Thanks to Zyb.
-- 
Igor Sysoev
http://sysoev.ru/en/