AuthenticationContext persistence

[Klingenstein, Nate]

> I don't know what you mean by "initial".

# Regular expression of forced "initial" methods when no session exists,
# usually in conjunction with the idp.authn.resolveAttribute property below.
# This can cause confusion if you enable it arbitrarily, so please leave
# unless you know why you're uncommenting it.
#idp.authn.flows.initial = Password

I'll read through the rest and understand it before I ask more questions.  I appreciate the in-depth explanation and the preview for 3.3.