cygwin not setting errno on "Connection refused" errors

[Christoph H. Hochstaetter]

>I just updated cygwin today, and I've noticed that errno is not being
>set when there's a connection refused error.  This appears to be true
>for INET and UNIX domain sockets.
>
>For example:
>
>$ ssh -p 12345 localhost
>ssh: connect to host localhost port 12345: No error
>
>
>Notice how it reports "No error" instead of "Connection refused".
>
>I'm using version 1.7.30 of cygwin64.  I don't remember what version I
>was at before I upgraded.

I can confirm that this happens to every application using connect().
errno always returns 0 if connect() returns < 0. strerror() then correctly
says "No error". Worked in 1.7.29. Tested with 64 bit only.

-Christoph

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