More uses of "fatal"

[Richard Kenner]

    That's as may be, but while we're there already :-), can you maybe
    document the existing categories / function calls?  Say I'm adding
    code and want the compiler to choke; how do I know which "fatal"
    function to use?

That's in the documentation in front of each routine in diagnostic.c.
Can you suggest a place to put the overview?