This breaks CAuthBase's API for modules that want to auth users.
Instead of overloading AcceptLogin() and RefuseLogin(), they now have to
overload AcceptedLogin() and RefusedLogin().
Modules that auth users (e.g. imapauth) still call AcceptLogin() and
RefuseLogin() which is where OnFailedLogin() gets called.
git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1389 726aef4b-f618-498e-8847-2d620e286838