RFR (XS) 8224849 : Flag (?U:...) is allowed for non-capturing groups

[Stuart Marks]

Hi Ivan,

I think this fix is correct and clearly the spec needed to be fixed. Since it is 
a change to the normative portion of the spec, though, it needs a CSR. This is 
probably mostly a formality to make sure the change is tracked for TCK purposes. 
Can you file a CSR for this please?

Let me know if you need a review for it.

Thanks,

s'marks