[Zope] Simplifying complex contexts/urls

[Jeffrey Shell]

> Only 256 characters is _guaranteed_, but you seem to be able to get
> away with quite a bit more.
> 
> My only other data point is that Internet Explorer is unhappy after
> about 2000 characters. My current project is likely to be pushing this
> limit, so I would be interested if anyone has seen anything lower.
> http://www.zope.org/Members/htrd/urllen contains a quick test.

IE 4.5 on the Mac seemed to go out a little bit longer than IE 5 on the
PC.  Apache hushed me up somewhere above 5000.