8.1-RELEASE Errata - Security Advisories

[Crispy]

Hi,

Apologies if I am asking a silly question, but I'm curious what 
decides whether a security advisory gets listed in a release 
errata. My question relates specifically to the following two 
documents:

http://www.freebsd.org/releases/8.0R/errata.html
http://www.freebsd.org/releases/8.1R/errata.html

The errata for 8.1 lists ten security advisories, all of which have 
been corrected in 8.1-RELEASE, yet few of them even mention 8.1-
RELEASE in any form. On the other hand, the 8.0 errata lists only 
three advisories, when it should contain many of the ones on the 
8.1 page.

I do not mean to be critical if it is merely a case of documents 
not being kept up to date, or a mistake being made in the 8.1 
errata. However, reading the errata for 8.1 makes it look as if 
there are a lot of security issues with the release already. I find 
this a bit confusing.

Many thanks in advance for any clarification you're able to offer.

--
Chris