Problem with session (MaxAge == 0) cookie

[harperj1029]

The change made in this commit appears to cause issues when trying to create session (non-durable) cookies. So now, when trying to set MaxAge = 0 (so that the cookie is session-only and doesn't live on), then it's instead deleted, and then set with an empty value. The result is an inability to have a session without having a persisted cookie.

NOTE: We use echo sessions in our project, which through dependencies, uses redistore. Some work-around was followed to pin go dep to use the master branch of redistore, rather than an older version.

[jon-mckinney]

Agreed, we're having the same issue noted by @harperj1029 above.