2.9.1 bugfix release

Closely following 2.9.0, there is 2.9.1 out now. This fixes two (old) bugs that became apparent just now.

One concerns new installations: If the supplementary tool geoiplookup_continent wasn't installed yet, it was impossible to create a new mirror, because the mb new tool relied on its existance. Now, a meaningful error message should point into the right direction.

Regarding the other issue, is not likely that anyone (but me) ran into it. It turns out that database connection strings used in the Apache configuration need to be unique per vhost. This release adds debugging output that may be helpful to track this down.

See the Release Notes for more verbose details.