Merge branch 'sb/submodule-move-nested'

Moving a submodule that itself has submodule in it with "git mv" forgot to make necessary adjustment to the nested sub-submodules; now the codepath learned to recurse into the submodules. * sb/submodule-move-nested: submodule: fixup nested submodules after moving the submodule submodule-config: remove submodule_from_cache submodule-config: add repository argument to submodule_from_{name, path} submodule-config: allow submodule_free to handle arbitrary repositories grep: remove "repo" arg from non-supporting funcs submodule.h: drop declaration of connect_work_tree_and_git_dir