!act Marked StashWhen* marker traits as internal API
=doc Update ZeroMQ pub/sub port mismatch between doc and code example
Merge pull request #1622 from drewhk/wip-internalize-sysmsg-helper-traits-drewhk

!act Marked StashWhen* marker traits as internal API
Merge pull request #1628 from fanf/patch-4

=doc Update ZeroMQ pub/sub port mismatch between doc and code example
=rem #3555: Wrong and superfluous match in EndpointWriter
Merge pull request #1615 from drewhk/wip-wrong-match-epwriter-drewhk

=rem #3555: Wrong and superfluous pattern match in EndpointWriter
Merge remote-tracking branch: upstream/master