Add /usr/lib/x86_64-linux-gnu/rubygems-integration trigger.
Marc,
I wanted to get your input on this before merging. It fixes the following bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1015751
Along these lines, would it be advisable to add maximum versions to build-depends in debian/control to match the gemfile, so that if a dependency is upgraded in a way that it will fail to satisfy the gemfile it will also cause the redmine package to be removed?