Merge branch 'jk/rev-parse-end-of-options'

"git rev-parse" learned the "--end-of-options" to help scripts to
safely take a parameter that is supposed to be a revision, e.g.
"git rev-parse --verify -q --end-of-options $rev".

* jk/rev-parse-end-of-options:
  rev-parse: handle --end-of-options
  rev-parse: put all options under the "-" check
  rev-parse: don't accept options after dashdash