Increase the URL segment limitations imposed by Apache

[GoogleCodeExporter]

With help from folks on modules-dev@httpd.apache.org we now have some ideas on 
how to relax our 256 character limitation on URL segments.  This can help us to 
combine more files (css files currently) than we are currently able to:

Ben Noordhuis to modules-dev
> I'm pretty sure it was
> due to some built-in filter or core element in httpd trying to map the URL
> to a filename (which is not necessary as far as mod_pagespeed is concerned)
> and bumping into an OS path limitation (showing up as 403 Forbidden).

This might be the doing of core_map_to_storage(). Never run into it
myself (with URLs up to 4K, anyway) but there you go.

Okay, here is a dirty secret: if you hook map_to_storage and return
DONE, you bypass Apache's authentication stack - and nearly all other
hooks too. Probably an exceedingly bad idea.

You can however use it to prevent core_map_to_storage() from running.
Just return OK and you're set.

Original issue reported on code.google.com by jmara...@google.com on 4 Jan 2011 at 11:28