Merge branch 'bw/push-options-recursively-to-submodules'

"git push --recurse-submodules --push-option=<string>" learned to propagate the push option recursively down to pushes in submodules. * bw/push-options-recursively-to-submodules: push: propagate remote and refspec with --recurse-submodules submodule--helper: add push-check subcommand remote: expose parse_push_refspec function push: propagate push-options with --recurse-submodules push: unmark a local variable as static