Implementation of advice field from Bayeux message.
A client MAY attempt to reconnect with a /meta/connect after
the interval (as defined by "interval" advice or client-default backoff),
and with the same credentials.
The server has terminated any prior connection status and
the client MUST reconnect with a /meta/handshake. A client
MUST NOT automatically retry if handshake advice has been received.
Hard failure for the connect attempt. Do not attempt to
reconnect at all. A client MUST respect reconnect advice
of none and MUST NOT automatically retry or handshake.
reconnect = reconnect.trim();