client_side changes

Adrian,
        hold off on serious testing of that patch, I've a couple of minor
tweaks to client side to accomodate large scale buffering (ergh, I know)
in the main client request that I think should go in at the same time
(to be nice to the coders trying to do content twiddling, not for
internal request support).

I'm just tidying them off now, will put a patch on a website shortly.

Cheers,
Rob