Merge branch 'am/pathspec-f-f-more'

"git rm" and "git stash" learns the new "--pathspec-from-file"
option.

* am/pathspec-f-f-more:
  stash push: support the --pathspec-from-file option
  stash: eliminate crude option parsing
  doc: stash: synchronize <pathspec> description
  doc: stash: document more options
  doc: stash: split options from description (2)
  doc: stash: split options from description (1)
  rm: support the --pathspec-from-file option
  doc: rm: synchronize <pathspec> description

diff --cc builtin/stash.c
Simple merge