prefix to all of the uri functions (yuck), changing some includes,
and using APR error codes instead of HTTP-specific error codes.

Other notes to test this patch:
- You need to delete the util_uri.h file - exports picks up on this.
- I'd like to remove the apr_uri.h from httpd.h, but that might
  increase the complexity of this patch even further.  Once this patch
  is accepted (in some form), then I can focus on removing apr_uri.h
  from httpd.h entirely.  I need baby steps (heh) right now.
- I imagine that this might break a bunch of stuff in Win32 or other OS
  builds with foreign dependency files.  Any help here is appreciated.

This is a start...  -- justin

Submitted by:	Justin Erenkrantz
Reviewed by:	Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89198 13f79535-47bb-0310-9956-ffa450edef68