4.4.4

Fixed

• HTTP/2: a connection is no longer reused after the peer sends GOAWAY while keeping the socket open (as AWS ALB does to recycle connections). The connection is retired so the pool dials a fresh one, instead of being handed out again with new streams the peer ignores until recv_timeout.
• HTTP/2: when the per-stream recv_timeout watchdog fires, the stalled stream is cancelled (RST_STREAM) so the peer stops sending and the connection is not reused with an orphaned stream.
• HTTP/1.1: bytes that issue #544's idle {active, once} delivers to the connection mailbox on a reused connection are now buffered and fed to the next request instead of dropping the connection (refines the 4.4.3 behavior), so a reused request no longer blocks to recv_timeout while the response sits stranded as an unread message. The idle buffer is bounded, and a server close still refuses reuse (#544).