4.4.2

Fixed

• Apply the pool overflow fix to the opt-in ssl_pooling checkout path. With ssl_pooling enabled and pool_size below max_per_host, a second concurrent HTTPS request could still fail with checkout_timeout; it now opens an overflow connection like the plain checkout path, closed at checkin rather than pooled. HTTP/2 and HTTP/3 are unaffected (they multiplex over shared connections). (#882)