handle annotated tags too Git has two types of pointers: annotated and lightweight ones. gmnigit was only handling lightweight ones (they are bare pointers to commits, just like git branches). This improve the tag support to handle annotated tags too, which are pointers to full git objects with various information, among which a pointer to the commit.
The following patch creates an additional file in /refs/index.gmi with the list of the tags and links to the relevant commit. It follows the companion specification for subscriptions, so users can easily subscribe to that page to know when a release is tagged. Please note that if a tag points to a commit that isn't reachable from any branch, the link won't work. This can happen if one created a branch off a tag, done some work, tagged a new version and deleted the branch.