BUG/MEDIUM: h2: Close connection if no stream is left an GOAWAY was sent.

When we're closing a stream, is there's no stream left and a goaway was sent,
close the connection, there's no reason to keep it open.

[wt: it's likely that this is needed in 1.8 as well, though it's unclear
 how to trigger this issue, some tests are needed]
1 file changed