cygport upload seems to ignore SSH_KEY

[Andrew Schulman]

> >> I haven't used cygport up in a long time - I use git push now, and let 
> >> scallywag build the packages
> 
> Is this workflow described somewhere?
> It sounds interesting.

Yes!

Git repositories for Cygwin packaging: https://cygwin.com/packaging/repos.html

Once you push your .cygport file up to the package's Cygwin git repo, the
package build service will try to build it:
https://cygwin.com/packaging/build.html