Wrong Hostname in relative path with mod_proxy

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What steps will reproduce the problem?
1. Configure mod_proxy with a different hostname
2. Display an html page withe an relative path

What is the expected output? What do you see instead?
Excpected: 
http://www.mysite.com/files/ce.d5ef78b5df0187a9947b79b4bd071b20.logo,p.png
Instead: http://xx.xx.xx.xx/files/ce.d5ef78b5df0187a9947b79b4bd071b20.logo,p.png

What version of the product are you using (please check X-Mod-Pagespeed
header)?
X-Mod-Pagespeed:0.9.0.0-0 / r181

On what operating system?
Debian

Which version of Apache?
Server version: Apache/2.2.9 (Debian)
Server built:   Apr 20 2010 15:42:00


Which MPM?

Please provide any additional information below, especially a URL or an
HTML file that exhibits the problem.

Absolute URL works fine.
I'm not sure, but I not remember this kind of error in older version.
Page speed use the host name defined in the mod_proxy configuration instead the 
the host name of the resquest.

You can find in attached files a simple way to reproduce this case.

Original issue reported on code.google.com by tanguy.c...@gmail.com on 12 Nov 2010 at 6:32

Attachments:

• proxy.conf
• index.html