[plt-scheme] regexp multiple matches?

Quoting Noel Welsh <noelwelsh at yahoo.com>:

> In MzLib string.ss:
> 
> (regexp-match* pattern str [start-k end-k])     
> PROCEDURE

With `regexp-match' the second argument may be an input-port.  Is there a reason
for not providing that functionality for `regexp-match*'? 

-d