Merge branch 'jk/submodule-remote-lookup-cleanup'

Updating submodules from the upstream did not work well when submodule's HEAD is detached, which has been improved. * jk/submodule-remote-lookup-cleanup: submodule: look up remotes by URL first submodule: move get_default_remote_submodule() submodule--helper: improve logic for fallback remote name remote: remove the_repository from some functions dir: move starts_with_dot(_dot)_slash to dir.h remote: fix tear down of struct remote remote: remove branch->merge_name and fix branch_release()