tzcode2000b.tar.gz and tzdata2000b.tar.gz

The files ftp://elsie.nci.nih.gov/pub/tzcode2000b.tar.gz and ftp://elsie.nci.nih.gov/pub/tzdata2000b.tar.gz are now available. These incorporate changes circulated on the time zone mailing list by Paul Eggert and Joseph Myers, as well as modest tweaks to the tz-art.htm and tz-link.htm files. --ado