Re: [RFC PATCH] docs: document upcoming breaking changes

> +
> + - git-config(1) has learned to use subcommands that replace implicit actions
> +   (e.g. `git config foo.bar baz`) as well as the action flags (e.g. `git config
> +   --unset-all`). The actions will be removed in favor of subcommands.
> +   Prerequisite for this change is that the new subcommands have been out for at
> +   least for two years to give script authors time to migrate.
> +
> +   Cf. <ZjiL7vu5kCVwpsLd@tanuki>.
> +
> + - git-http-push(1) can be used to push objects to a remote repository via
> +   HTTP/DAV. Support for write support via WebDAV is not in widespread use
> +   nowadays anymore and will be removed together with the command.
> +
> + - The dumb HTTP protocol can be used to serve repositories via a plain HTTP
> +   server like Apache. The protocol has not seen any updates recently and is
> +   neither compatible with alternative hash functions nor with alternative ref
> +   backends. It will thus be removed.
> +
> + - git-update-server-info(1) generates data required when serving data via the
> +   dumb HTTP protocol. Given the removal of that protocol, it serves no purpose
> +   anymore and will be removed together with the protocol. This includes the
> +   "receive.updateServerInfo" and "repack.updateServerInfo" config keys and the
> +   `git repack -n` flag.
> +
> + - `$GIT_DIR/branches/` and `$GIT_DIR/remotes/` can be used to specify
> +   shorthands for URLs for git-fetch(1), git-pull(1) and git-push(1). This
> +   concept has long been replaced by remotes and will thus be removed.
> +
> + - git-annotate(1) is an alias for git-blame(1) with the `-c` flag. It will
> +   be removed in favor of git-blame(1).
> +
> + - "gitweb" and git-instaweb(1) can be used to browse Git repositories via an
> +   HTTP server. These scripts have been unmaintained for a significant amount of
> +   time and will be removed.
> +
> + - git-filter-branch(1) can be used to rewrite history of a repository. It is
> +   very slow, hard to use and has many gotchas. It will thus be removed in favor
> +   of [git-filter-repo](https://github.com/newren/git-filter-repo).
> +
> + - githooks(5) can be installed by placing them into `$GIT_DIR/hooks/`. This has
> +   been a source of multiple remote code execution vulnerabilities. The feature
> +   will be removed in favor of `core.hooksDirectory` and the new config-based
> +   hooks.