Bug#620759: apache2: apache does chroot twice with mod_chroot

["Stephan.Goll@t-online.de" <Stephan.Goll@t-online.de>]

>From Stefan Fritsch:
> 
> If mod_chroot is not compatible with squeeze's apache, we should 
> have it removed from squeeze. Did everything work after you 
> removed mod_chroot? Did you have to adjust the configuration?
>
Let me explain what happened. With mod_chroot, the apache did the 
chroot twice and (in my case) the original DocumentRoot then has to 
be / This is because in lenny my DocumentRoot was the directory 
/var/www inside the chroot (/var/www/ too). So the chain is /var/www 
(first chroot) -> /var/www/var/www/ (first and second chroot) and then 
my files are _not _ found under a third /var/www directory (this would 
happen when the DocumentRoot is set to /var/www) but  /.

Without mod_chroot the apache changes once to /var/www and my 
files are found unter the DocumentRoot /var/www as expected.

So the mod_chroot is working absolutely fine under squeeze.
But together with the builtin chroot the behavior is unexpected and 
confusing. Yes, one must change the DocumentRoot when using 
mod_chroot ... and maybe some directories in the filesystem 
because of the double chroot. But beside of this the mod_chroot 
is working perfect. I do not think that mod_chroot needs to be 
removed from squeeze but the documentation in /usr/share/doc/
mod-chroot-common/ should give a hint about this possible trouble 
source.
Stephan