preloading high-value entity metadata

[Cantor, Scott]

> I intentionally skipped all the details to keep this brief. Does it make sense to
> extend DynamicHTTPMetadataProvider in this way?

I thought it already did all that, that was one of the features identified by the original InCommon WG, the ability to back up the query results and reload them up front to prime the cache. I admittedly don't know how to configure it. Maybe it got missed or just wasn't documented.

-- Scott