Cookies: automatic "expires" setting

[jodosha]

Old browsers (IE 6, 7, 8), don't support max-age setting.

If we set default :max_age from Lotus::Configuration, or we specify inline in a cookie cookie[:foo] = {value: 'bar', max_age: 300}, it will be ignored.

I think it's our role to provide transparent solutions to browsers quirks.
We should set expires automatically, when it isn't present, but max-age is.

# Do nothing
cookies[:foo] = 'bar'

# Do nothing
cookies[:foo] = { value: 'bar', expires: Time.parse('2015-05-14 12:01:00') }

# Automatically set expires 
cookies[:foo] = { value: 'bar', max_age: 120 }

See http://mrcoles.com/blog/cookies-max-age-vs-expires/