Buggy date calculation in ._delete_cookie

[mikeorr]

beaker.session.Session._delete_cookie() contains a buggy date calculation.

expires = datetime.utcnow().replace(year=2003)

On February 29th of a leap year this raises:

ValueError: day is out of range for month

The apparent goal is to set a date in the past. Can't it just use a fixed date like '2003-01-01'?

[bbangert]

Yep, this was actually fixed yesterday, and the new Beaker release contains it.

[dkavanagh]

Linking to fix: b5afb4d