tzcode1997a.tar.gz and tzdata1997a.tar.gz

[Arthur David Olson]

The files
	ftp://elsie.nci.nih.gov/pub/tzcode1997a.tar.gz
and
	ftp://elsie.nci.nih.gov/pub/tzdata1997a.tar.gz
are now available. These include Paul Eggert's Antarctica (and other changes).
I've finessed the "getopt" issue by checking against both -1 and EOF
(regardless of POSIX, SunOS 4.1.1's manual says -1 is returned while
SunOS 5.5's manual says EOF is returned).

				--ado