Merge branch 'js/plug-leaks'

Fix memory leaks pointed out by Coverity (and people).

* js/plug-leaks: (26 commits)
  checkout: fix memory leak
  submodule_uses_worktrees(): plug memory leak
  show_worktree(): plug memory leak
  name-rev: avoid leaking memory in the `deref` case
  remote: plug memory leak in match_explicit()
  add_reflog_for_walk: avoid memory leak
  shallow: avoid memory leak
  line-log: avoid memory leak
  receive-pack: plug memory leak in update()
  fast-export: avoid leaking memory in handle_tag()
  mktree: plug memory leaks reported by Coverity
  pack-redundant: plug memory leak
  setup_discovered_git_dir(): plug memory leak
  setup_bare_git_dir(): help static analysis
  split_commit_in_progress(): simplify & fix memory leak
  checkout: fix memory leak
  cat-file: fix memory leak
  mailinfo & mailsplit: check for EOF while parsing
  status: close file descriptor after reading git-rebase-todo
  difftool: address a couple of resource/memory leaks
  ...

builtin/fast-export.c

@@ -734,6 +734,7 @@ static void handle_tag(const char *name, struct tag *tag)
 			     oid_to_hex(&tag->object.oid));
 		case DROP:
 			/* Ignore this tag altogether */
+			free(buf);
 			return;
 		case REWRITE:
 			if (tagged->type != OBJ_COMMIT) {
@@ -765,6 +766,7 @@ static void handle_tag(const char *name, struct tag *tag)
 	       (int)(tagger_end - tagger), tagger,
 	       tagger == tagger_end ? "" : "\n",
 	       (int)message_size, (int)message_size, message ? message : "");
+	free(buf);
 }
 
 static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name)