Confluence admin needed to set up snippet urls

[David Jencks]

I think we should work hard to make the documentation reference live  
svn content using the snippet plugin.  However my initial attempts

http://cwiki.apache.org/confluence/display/GMOxDOC21/Plugin 
+infrastructure

appear to indicate that a confluence admin has to set up at least one  
configured url prefix.  AFAICT I'm not a confluence admin and if I  
was I'd still have no idea how to set this up.

Also I'm really not sure what an appropriate prefix would be or what  
the scope for which it applies is.  I certainly want to be able to  
include snippets from server, plugins, etc etc but wonder if  
including e.g branch info in the prefix would help migrating docs  
from one version to another.  Does anyone have a clue what "best  
practice" or "anything that works" might be?

thanks
david jencks