Comment 26 for bug 562370

Well, from the other bug # you linked, I was able to get enough of a hint to trace this back to a problem of:
I have /etc/apache2 symlinked to another location where I keep all my server configs version controlled in a directory where everything is backed up on a daily basis. Apparently apt at some point created /etc/apache2.dist and started stuffing things there rather than following the symlink, which is what it used to do just fine... It was just a matter of copying over the reqtimeout.* from that other location into my existing /etc/apache2/mods-available and re-running the install.