io.sockets.secure.unix: Stop these tests from hanging on errors.
io.sockets.secure.unix: Stop these tests from hanging on errors.

Specifically, the server writes its port to a mailbox. On Mac 10.11.6, the last macOS for my old computers, TLS1.0 is the last supported SSL protocol, and there is a yet-undebugged error. This patch at least exposes the error for debugging.

factor/factor,factor/factor,AlexIljin/factor,mrjbq7/factor,factor/factor,tgunr/factor,factor/factor,mrjbq7/factor,factor/factor,AlexIljin/factor,mrjbq7/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,AlexIljin/factor,tgunr/factor,bpollack/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,AlexIljin/factor,bpollack/factor,tgunr/factor,AlexIljin/factor,AlexIljin/factor,mrjbq7/factor,factor/factor,tgunr/factor