just a curiosity about auth.conf

[ASV]

Good afternoon and happy new year to everybody.

I'm just curious about auth.conf.

According to the detailed release notes
(http://www.freebsd.org/releases/9.1R/relnotes-detailed.html):
"auth.conf(5) has been removed because it was deprecated years
ago.[r238481]"

but according to the man pages online AUTH.CONF(5) of FBSD9.0-RELEASE:
"auth.conf contains various attributes important to the authentication
code, most notably crypt(3) for the time being. This documentation will
be updated as the /etc/auth.conf file, which is very new, evolves.".

How can something deprecated years ago being new and evolving quickly
enough to require further doc updates? Am I missing something? :)