[Seaside] Seaside load support

[Marco Paga]

Hi.

> We've been using apache with mod_rewrite and mod_proxy to give us
> multiple instances with rollover.  So far we've only been running one
> instance of each new version we deploy but we could easily run more than
> one to handle more load.  From there, we may stumble across other issues
> but I think that will get us a lot of the way.

I've been seeking around but I never found a good document describing the 
configuration. Could you send me a link to a good website if there is one?

Regards
Marco