To update this from the CVS upstream, just copy the files:

   SSAX.scm
   look-for-str.scm

in place.  You'll also want to comment out the run-test definition in
SSAX.scm and uncomment the version that expands into a noop.

To all would-be hackers of this code: As you can infer from the note
above, this code should never be changed for Chicken without also
providing patches upstream because it is intended to allow for drop-in
replacement when upgrading the code.  If you have to build a Chicken-
specific workaround, you can hack it in ssax-chicken.scm