ports security branch

[rihad]

Is there a security branch for the FreeBSD ports collection?  Let's say, 
I installed FreeBSD 6.0 together with all needed -RELEASE 
ports/packages. Running security/portaudit after a while reveals that 
some of the installed packages have vulnerabilities. Am I on my own to 
go grab the fresh ports tree, and upgrade the affected software, 
suffering all the intricacies of the move by myself? Debian GNU/Linux 
has its security package updates, OpenBSD has a separately maintained 
"errata" ports branch (you still get to download a newer release of the 
software, though (IIRC)).