Teach `format-patch` a convenient alias for `--pretty=mboxrd`.

* ew/format-patch-mboxrd:
  format-patch: add --mboxrd alias for --pretty=mboxrd

Fix a bug where `pack-objects` would not respect multiple `--filter`
arguments when invoked directly.

* rs/multi-filter-args:
  list-objects-filter: remove OPT_PARSE_LIST_OBJECTS_FILTER_INIT()
  pack-object: simplify --filter handling
  pack-objects: fix handling of multiple --filter options

Use `git diff --no-index` as a test_cmp on Windows.

* js/drop-mingw-test-cmp:
  tests(mingw): avoid very slow `mingw_test_cmp`
  t0021: use Windows-friendly `pwd`

Assorted fixes of parsing end-user input as integers.

* pw/config-int-parse-fixes:
  git_parse_signed(): avoid integer overflow
  config: require at least one digit when parsing numbers
  git_parse_unsigned: reject negative values

"git clone --recurse-submodules" and "git submodule update" learns
to honor the "propagete branches" option.

* gc/submodule-clone-update-with-branches:
  clone, submodule update: create and check out branches
  submodule--helper: remove update_data.suboid
  submodule update: refactor update targets
  submodule: return target of submodule symref
  t5617: drop references to remote-tracking branches
  submodule--helper clone: create named branch
  repo-settings: add submodule_propagate_branches
  clone: teach --detach option

Allow the internal "diff-files" engine to run "how has this
submodule changed?" in parallel to speed up "git status".

* cw/submodule-status-in-parallel:
  diff-lib: parallelize run_diff_files for submodules
  diff-lib: refactor match_stat_with_submodule
  submodule: move status parsing into function
  submodule: strbuf variable rename
  run-command: add duplicate_output_fn to run_processes_parallel_opts

'git notes append' was taught '--[no-]blank-line' to conditionally
add a LF between a new and existing note.

* tl/notes--blankline:
  notes.c: introduce "--no-blank-line" option
  notes.c: provide tips when target and append note are both empty
  notes.c: drop unreachable code in 'append_edit()'
  notes.c: cleanup for "designated init" and "char ptr init"
  notes.c: cleanup 'strbuf_grow' call in 'append_edit'

* ds/packed-refs-v2: (30 commits)
  refs: skip hashing when writing packed-refs v2
  p1401: create performance test for ref operations
  ci: run GIT_TEST_PACKED_REFS_VERSION=2 in some builds
  t*: skip packed-refs v2 over http tests
  t3210: require packed-refs v1 for some tests
  t5502: add PACKED_REFS_V1 prerequisite
  t5312: allow packed-refs v2 format
  t1409: test with packed-refs v2
  packed-backend: create GIT_TEST_PACKED_REFS_VERSION
  packed-refs: write prefix chunks
  packed-refs: read optional prefix chunks
  packed-refs: read file format v2
  packed-refs: write file format version 2
  packed-backend: create shell of v2 writes
  config: add config values for packed-refs v2
  packed-backend: create abstraction for writing refs
  packed-backend: extract iterator/updates merge
  packed-backend: extract add_write_error()
  refs: extract packfile format to new file
  chunk-format: parse trailing table of contents
  ...

'git worktree add' learned how to create a worktree based on an
orphaned branch with `--orphan`.

* ja/worktree-orphan:
  worktree add: add --orphan flag
  worktree add: Include -B in usage docs

Introduce a case insensitive mode to the Bash completion helpers.

* aw/complete-case-insensitive:
  completion: add case-insensitive match of pseudorefs
  completion: add optional ignore-case when matching refs