The new combined decisions text

All,

Here is the updated text which I have put in the specs on the combined
decision.

Please review this now, so we don't need to make another round of an
updated spec on Jan 7.

Core schema:

The entire text of multiple profile, section 3:

3 Requests for a combined decision
{Optional}

A request for multiple decisions as specified by any of the schemes in
section 2 MAY in addition specify that the Individual Decisions be
combined into a single aggregated decision and that only this single
combined decision will be returned to the PEP.

If the CombinedDecision attribute of the initial