upgrading from 0.9.1.2 - and now: working with exim4.22w/exisan

[David Relson]

A minor revision:

 case $result in
   U*|H*) # ham or unsure
          deliver
          ;;
   S*)    # spam
          reject
          ;;
   *)     echo >&2 "Unparsable result \"$result\""
          exit $EX_TEMPFAIL