outdated $ conversion in units(1)

[SKY]

That's nice, but putting currency ratios in the units program has
always been a questionable feature.  I would hardly call these
invariant natural constants.  As the BUGS section in my manual says,
Don't base your financial plans on the currency conversions. If such a
feature is needed, it would have been better to modify units(6) to
accept a user supplied database.

	Ken