other OSs), and fails consistently if run with `go test -times=N`
On inspection, Go closes TCP connections when they go out of scope and
are garbage collected. I've re-written Test_Connections() to explicitly
close connectections once the test has finished. This has the other
benefit of closing gracefully, which means the -times argument should
work.
I've also removed the t.Skip() calls inside goroutines as they are
unsupported.
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