extending the time range

[Joseph S. D. Yao]

Agreed, there should probably be a new data type (although mark's
suggestion tickles my fancy, as a short-range hack).  But 64 bits
is still limiting.  I like an earlier suggestion to use a text-
string or a coded decimal string date.

	Joe Yao		jsdy at hadron.COM (not yet domainised)
	hadron!jsdy@{seismo.CSS.GOV,dtix.ARPA,decuac.DEC.COM}
{arinc,att,avatar,cos,decuac,dtix,ecogong,kcwc}!hadron!jsdy
     {netex,netxcom,rlgvax,seismo,smsdpg,sundc}!hadron!jsdy