Persistent cookie

[jon-mckinney]

According to your documentation:

• MaxAge=0 means no 'Max-Age' attribute specified.

However, the dependency boj/redistore breaks this ability in the commit referenced here:
boj/redistore@715bb32

This is a basic part of any session service, how do we implement this feature in your package?

[ipfans]

Oh, of course. Welcome to PR