upgrade from 8.2 to 9.0

[Dick Hoogendijk]

I possible I want my server to upgrade from 8.2-RELEASE to 9.0-RELEASE.
I guess the binary upgrade will not be a problem with "freebsd-update -r 
9.0-RELEASE fetch" If so, I do like to hear the caveats.
My main problem lies with the installed ports. I know the -all- have to 
be recompiled, but I don't know an easy way for this job.  I always use 
portmaster. Do I have to make a list manually for all installed ports? 
Or is there a procedure to follow in this matter? I'd like to get some 
pointers if possible.
Thanks.