Merge branch 'la/tag-force-signing-annotated-tags'

"git tag" can create an annotated tag without explicitly given an "-a" (or "-s") option (i.e. when a tag message is given). A new configuration variable, tag.forceSignAnnotated, can be used to tell the command to create signed tag in such a situation. * la/tag-force-signing-annotated-tags: tag: add the option to force signing of annotated tags