Dependency versions are generally not useful, unless you are developing
or otherwise outside of a normal release situation: If you are on a
normal release, we can figure out the dep versions by looking at the
docker image.
To reduce the amount of information displayed and the amount of
information which needs to be conveyed in case of problems, we only show
the web portal and prosody versions to admins, unless debug mode is
enabled.
The behaviour that versions are only shown to logged in admins (unless
debug mode is enabled) remains unchanged.
Fixes#115.
6d50b1c2c7