Comment 3 for bug 1432057

This does not seem to have anything to with NAV, really. It seems to be
a case of this bug:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=413457

I.e. some part of NAV happens to import the xmpp module, but I can
assure you it is not being used in web interface - it's more likely some
part of the web interface imports parts of the alertengine library,
causing xmpp to be pulled in at the same time.

The Debian bug report claims the bug was fixed by adding
python-dnspython to the list of recommended packages in the python-xmpp
package, but the problem with the virtual appliance seems to be that
packages are installed using the '--without-recommends' option to
apt-get.