Merge branch 'js/for-each-ref-remote-name-and-ref'

The "--format=..." option "git for-each-ref" takes learned to show the name of the 'remote' repository and the ref at the remote side that is affected for 'upstream' and 'push' via "%(push:remotename)" and friends. * js/for-each-ref-remote-name-and-ref: for-each-ref: test :remotename and :remoteref for-each-ref: let upstream/push report the remote ref name for-each-ref: let upstream/push optionally report the remote name