comments on README and AK time zones

[Paul Eggert]

Thanks very much for the detailed historical info about Alaska.
May we have permission to adapt those comments for use in the
"northamerica" file of the tz database?

Also, do you happen to have the exact dates and times for the official
transitions for Juneau in 1980?  Also, how well did the change "take"?
This would seem to be the most urgent correction to the existing database.