to move csup 90 to subversion 91rc

[Darrel]

Hello,

If my csup file looks about like this:

*default host=this_working_mirror
*default base=/var/db
*default prefix=/usr
*default release=cvs tag=RELENG_9_0
*default delete use-rel-suffix

and my machine now has devel/subversion

what is the quickest way to get the new release candidate sources with 
svn?

Then, can I simply build{w,k}, install{w,k} as before?

Regards,
Darrel