Re: [PATCH 09/10] fmt-merge-msg: Add contents of merged tag in the merge message

> When a contributor asks the integrator to merge her history, a signed tag
> can be a good vehicle to communicate the authenticity of the request while
> conveying other information such as the purpose of the topic.
> 
> E.g. a signed tag "for-linus" can be created, and the integrator can run:
> 
>    $ git pull git://example.com/work.git/ for-linus
> 
> This would allow the integrator to run "git verify-tag FETCH_HEAD" to
> validate the signed tag.
> 
> While we do not necessarily want to clutter the global tag namespace of
> the project, we would want to leave enough information in the repository
> to allow third party to later validate the resulting history.
> 
> Update fmt-merge-msg that prepares the merge message template, and store
> the contents of the signed tag object and the message that comes from GPG
> signature validation at the end of it. The integrator can choose to leave
> the contents of the tag in the resulting merge commit, or can choose to
> remove it. The GPG validation message is inserted as a comment only to
> help the integrator to review the validation result but otherwise will not
> be recorded in the resulting merge commit, because later validation by
> third parties does not need it.