Merge branch 'ab/submodule-helper-leakfix'

Plugging leaks in submodule--helper. * ab/submodule-helper-leakfix: submodule--helper: fix a configure_added_submodule() leak submodule--helper: free rest of "displaypath" in "struct update_data" submodule--helper: free some "displaypath" in "struct update_data" submodule--helper: fix a memory leak in print_status() submodule--helper: fix a leak in module_add() submodule--helper: fix obscure leak in module_add() submodule--helper: fix "reference" leak submodule--helper: fix a memory leak in get_default_remote_submodule() submodule--helper: fix a leak with repo_clear() submodule--helper: fix "sm_path" and other "module_cb_list" leaks submodule--helper: fix "errmsg_str" memory leak submodule--helper: add and use *_release() functions submodule--helper: don't leak {run,capture}_command() cp.dir argument submodule--helper: "struct pathspec" memory leak in module_update() submodule--helper: fix most "struct pathspec" memory leaks submodule--helper: fix trivial get_default_remote_submodule() leak submodule--helper: fix a leak in "clone_submodule"