apache conf: moved statements to -web config file

Because these will fail when the web client is not present, such
as when only the -server package is installed.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
contrib/install-autotest-server.sh: check for apache modules before linking

Newer versions of apache2 packages on Ubuntu (as of 12.10) do not ship
with mod_version.c as a separate shared object, but back again built into
the apache2 binary.

So, check before we link to a possibly non-existing file.

This is a fix for github issue #601.

Signed-off-by: Cleber Rosa <crosa@redhat.com>