- props being NULL is NOT an error and is a condition that all modules
must be prepared to handle
- having this module bomb out for spurious reasons makes this module
difficult to use for testing things
- keep comment update
- keep some KNF
- add a notice for the case when props is NULL
that prevents a source file to be named exactly as the final module. Thanks
to pooka@ and mrg@ for pointing out how to resolve this.
Also define NOMAN because there is no manual page here.