Redis store does not reconnect automatically

[naholyr]

This is a serious issue as the server will permanently fail to provide a valid req.session in following scenarios:

• Redis is started after the node process
• Redis is restarted during node process' life

In both scnearios you have to restart node process to recover a working server.

[adrai]

You have 2 possibilities:

• define a retry_strategy function in the options
• catch the disconnect event and restart (kill) the node process