csup to svn for 8-stable

[Warren Block]

On Fri, 11 Jan 2013, Brian W. wrote:

> When I tried the first time, it only grabbed a few folders, a second try
> got me a conflict message. I then just whacked /usr/src and did the svn co
> again, successfully.

An important difference is that if you modify a file in /usr/src, an svn 
update will not overwrite it but try to merge with new versions of the 
file from the repository.