[cygwin] openssh connection sharing fails: "mux_client_request_session: read from master failed: Connection reset by peer"

[Adam Dinwoodie]

On Mon, Jan 17, 2022 at 11:52:01AM -0500, Jason Pyeron wrote:
> > -----Original Message-----
> > From: Adam Dinwoodie
> > Sent: Monday, January 17, 2022 11:30 AM
> > 
> > The SSH connection sharing function in Cygwin's openssh release, using
> > `ssh -M` or the ssh_config.5 ControlMaster configuration, doesn't appear
> > to work.  Setting up a master connection seems fine, but subsequent SSH
> 
> Sadly, it is a known issue.
> 
> https://stackoverflow.com/questions/20959792/is-ssh-controlmaster-with-cygwin-on-windows-actually-possible/21439862#21439862

Ah, I had found a bunch of discussions on sites like Stack Overflow, but
I don't like to assume that problems discussed there are necessarily
known to the relevant Cygwin folk unless I've found them discussed on
the Cygin mailing lists.  In this case, it clearly has been, but I
didn't expect to have to search as far back as 2015 to find those
discussions!