Merge branch 'nd/submodule-pathspec-ending-with-slash'

Allow "git cmd path/", when the 'path' is where a submodule is
bound to the top-level working tree, to match 'path', despite the
extra and unnecessary trailing slash.

* nd/submodule-pathspec-ending-with-slash:
  clean: use cache_name_is_other()
  clean: replace match_pathspec() with dir_path_match()
  pathspec: pass directory indicator to match_pathspec_item()
  match_pathspec: match pathspec "foo/" against directory "foo"
  dir.c: prepare match_pathspec_item for taking more flags
  pathspec: rename match_pathspec_depth() to match_pathspec()
  pathspec: convert some match_pathspec_depth() to dir_path_match()
  pathspec: convert some match_pathspec_depth() to ce_path_match()

t/t4010-diff-pathspec.sh

@@ -140,4 +140,10 @@ test_expect_success 'diff multiple wildcard pathspecs' '
 	test_cmp expect actual
 '
 
+test_expect_success 'diff-cache ignores trailing slash on submodule path' '
+	git diff --name-only HEAD^ submod >expect &&
+	git diff --name-only HEAD^ submod/ >actual &&
+	test_cmp expect actual
+'
+
 test_done