Apache 2.4 and AAA

Hi.
Over the years, I have created and modified and re-modified my own Apache/mod_perl 
authentication module, which was originally derived from Apache(2?)::AuthCookie (pilfered 
would be the correct term I guess).
It currently runs up to Apache 2.2, but I have heard/read in various places that the 
Apache AAA interface had been changed significantly in 2.4.
I figure that I should thus start updating my module, before all my customers update their 
Apache and make my module obsolete.
But although I have seen many warnings about the changes, I have not really see yet any 
real outline of the changes in mod_perl AAA API calls, that would likely have to be made 
to accomodate this.
Would anyone have more info or pointers on that general subject ?

Thanks in advance
André