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