Changed the string representation of HTTPRequest so that <!--#var REQUEST--> is a lot friendlier. Along the was I cleaned up URLn and BASEn calculations a little.

it return?

to clue in clueless mortals (like me).

without screwing up everything else.

  PickleError
     PicklingError
        UnpickleableError
     UnpicklingError

And change the handling of unpickleable objects so that an UnpickleableError
is raised with the unpickleable object as the argument.  UnpickleableError
has a reasonable string representation and provides access to the problem
object, which is useful during debugging.

a persistent object.  Importing Main breaks Zope 2 (which doesn't use Main).
Note that something needs to import Main or Zope before this gets called.

can use it and not import Main.

we can test for persistence from C.

browser caching to behave correctly :(

ZClasses.

handle 304 responses very well.