The Osmocom project is switching from a list of separate trac projects to a single instance of redmine. One German legal requirement is to publish contact information (Impressum) and it needs to be easily discoverable. The easiest seems to be to add this to the top level menu of our redmine. This way it will be available on all pages and just one (or two on mobile to open the menu) clicks away.

The below can be placed in a file called plugins/impressum_plugin/init.rb and will use the Redmine::MenuManager to add an entry to the top level menu. The below is everything that is needed to add an entry. We want the item to be last and point to a wiki page.