Merge branch 'master' into next

Merge branch 'master' into next

* master:
  pull: Document the "--[no-]recurse-submodules" options
  quote.h: simplify the inclusion
  sha1_object_info: examine cached_object store too
  sha1_file.c: move find_cached_object up so sha1_object_info can use it
  Add const to parse_{commit,tag}_buffer()
  diff: support --cached on unborn branches
  gitweb: Mention optional Perl modules in INSTALL
  post-receive-email: suppress error if description file missing
  t7407: fix line endings for mingw build
  t4120-apply-popt: help systems with core.filemode=false
  t3509: use unconstrained initial test to setup repository.
  start_command: flush buffers in the WIN32 code path as well
  bundle: Use OFS_DELTA in bundle files