tzcode2002c.tar.gz and tzdata2002c.tar.gz

The files ftp://elsie.nci.nih.gov/pub/tzcode2002c.tar.gz and ftp://elsie.nci.nih.gov/pub/tzdata2002c.tar.gz are now available. These include the changes circulated by Paul Eggert last week on the time zone mailing list, and the change to zic.c to avoid creating symlinks to files that don't exist. --ado