"mis" update review request

[Frank Ellermann]

Harald Tveit Alvestrand wrote:

>> a use for "und-Latn" and "und-IN" has now been found.
 
> Reinforcing my deep disquiet with the whole idea of using
> the LANGUAGE tag to indicate SCRIPT.

The REGION subtags are also odd, maybe Debbie's ISO 639-6
will be simply better than the complete 3066 + 4646 idea.
Until then SCRIPTs are necessary in this brave new Unicode
world.

Frank