This step involves updating the source to the version you want to install using the svn utility.
In our case we will use the RELEASE version of Free BSD 9.1 (see notes.
Note on the move from CVS to subversion: The notes on manual methods have been updated to reflect the Free BSD change from CVS to subversion that from March 2013 covers both source upgrades and the ports system. We do nothing exciting, nothing even remotely interesting and if it smacks of risk, we lie down in a dark room for a couple of hours, then check that we have access to emergency medical assistance, before doing anything. Free BSD finally stops maintaining our release and we gotta do something. Hell can freeze over before we break that last rule.
This survival guide was written because we suspect we are not alone and besides, the down-side of the 'slothful' maintenance theory is we are not constantly doing stuff and so forget....a lot....frequently.
Some level of risk is involved, offset against being udated for the lastest security fixes, and significantly lower risk than using -CURRENT.