Merge branch 'maint'

* maint:
  Makefile: add merge_recursive.h to LIB_H
  Improve documentation for --dirstat diff option
  Bring local clone's origin URL in line with that of a remote clone
  Documentation: minor cleanup in a use case in 'git stash' manual
  Documentation: fix disappeared lines in 'git stash' manpage
  Documentation: fix reference to a for-each-ref option

diff --cc Documentation/diff-options.txt
Simple merge

diff --cc Makefile
Simple merge