Caching CVSUP

[Dave Horsfall]

Laptop running 5.3 connecting to Internet via server running 4.11 (both to 
be upgraded to their next respective major releases soon).

Is it possible for the laptop to use the server as a CVSUP cache, somehow?  
That is, check with the server first, and if not found then get the new 
port whilst refreshing the server at the same time.  I'm thinking that the 
server would do a CVSUP each night (or whenever).

The idea is that I don't want the pair of them to be doing their own 
independant CVSUPs.

I can't simply NFS-mount /usr/ports because of the differing releases, and 
likewise I can't quite see how [union]mounting /usr/ports/distfiles could 
help, either.

Any ideas?

-- Dave