PRI #208, #209: Unicode Security: new proposed updates

UTR #36, Unicode Security Considerations and UTS #39, Unicode Security
Mechanisms provide guidance and mechanisms to help deal with Unicode
Security issues.

There are significant additions and changes in the new proposed updates
of these specifications. The definition of Restriction Levels has moved
from UTR #36 to UTS #39, which also adds two new conformance clauses and
specifications for Restriction Levels and mixed number detection, an
amended specification for mixed script detection, and updates for
Unicode 6.1.

There are several of review notes requesting feedback on particular
issues. Please submit feedback on those and the rest of this document by
May 1 for consideration at the UTC meeting on May 7. For details, see:

http://www.unicode.org/review/pri208/
http://www.unicode.org/review/pri209/

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