MEDIUM: session: allow shorter retry delay if timeout connect is small

MEDIUM: session: allow shorter retry delay if timeout connect is small

As discussed with Dmitry Sivachenko, the default 1-second connect retry
delay can be large for situations where the connect timeout is much smaller,
because it means that an active connection reject will take more time to be
retried than a silent drop, and that does not make sense.

This patch changes this so that the retry delay is the minimum of 1 second
and the connect timeout. That way people running with sub-second connect
timeout will benefit from the shorter reconnect.