Stable schema locations

[Rod Widdowson]

> The problem is that won't work as intended unless you change the
> spring.schemas files. It will use the remote schemas at runtime when you
> start the IdP, and that's not what we want. You can't have the
> spring.schemas file out of sync with the schemaLocation header.

Apologies, I wasn't suggesting that we make use of it.  That way lies
disaster as you say.  I was just suggesting that as a way of having the
legacy schemas available online to point people to "Oh, you are using V3.2,
this is prior to that change - in that release the schema as per <URL>,