Merge branch 'ab/plug-random-leaks'

Merge branch 'ab/plug-random-leaks'

Plug random memory leaks.

* ab/plug-random-leaks:
  repository.c: free the "path cache" in repo_clear()
  range-diff: plug memory leak in read_patches()
  range-diff: plug memory leak in common invocation
  lockfile API users: simplify and don't leak "path"
  commit-graph: stop fill_oids_from_packs() progress on error and free()
  commit-graph: fix memory leak in misused string_list API
  submodule--helper: fix trivial leak in module_add()
  transport: stop needlessly copying bundle header references
  bundle: call strvec_clear() on allocated strvec
  remote-curl.c: free memory in cmd_main()
  urlmatch.c: add and use a *_release() function
  diff.c: free "buf" in diff_words_flush()
  merge-base: free() allocated "struct commit **" list
  index-pack: fix memory leaks