HttpClient parameterization

[Cantor, Scott]

> - I'll complete the refactoring that I started in IdP 680
> - We move all defaults down to java-support, suitably named (so not
> "Dynamic Metadata", but "small download", or some such)
>    But I forget precisely how we decided to do so.  I have a memory of there
> being some sort of enumeration for the defaults?  Can
> someone help me out?

I thought what we concluded was we'd probably live with it for now and incorporate this issue into the refactoring of the HttpClient builders and other code, possibly connected to the work to upgrade that library. Probably a 4.0 thing.

That was what I took away from it, but maybe I'm projecting.

My issue was the multiple classes and the duplication, and Brent had mentioned maybe just collapsing that back into a single builder class or injecting some kind of caching facet that would offload that, but that would be a 4.0 thing.

-- Scott