I have been convinced that these are useful enough to add.  However,
the portable implementation of string-contains-right will probably be
less efficient than string-contains.

--
John Cowan          http://www.ccil.org/~cowan        xxxxxx@ccil.org
Female celebrity stalker, on a hot morning in Cairo:
"Imagine, Colonel Lawrence, ninety-two already!"
El Auruns's reply:  "Many happy returns of the day!"