Custom nameid getting released in version 2 but not version 3

[Klingenstein, Nate]

> There are numerous things that don't work right in V2 when you create
> esoteric filter policies that act on other attributes. In V3, they all do
> predictable things, but those things aren't always what people expect them
> to be.

A great illustrative example arose during the Installfests that led to this getting deprecated because of sheer confusion.  You can copy and paste from the referenced issue, or fiddle with it.  It still doesn't make any sense to me either.

https://spaces.internet2.edu/pages/viewpage.action?pageId=49841792#LinuxIdentityProviderIdPv3(RHEL7)-4.FancyAttributeFilterPolicies