SunOS: 1; portability: 0

[Guy Harris]

>Note 1.  Actually, I'm not fully convinced that signal handlers should
>return void rather than int.  Letting them return int allows a future
>extension to signal handlers so that they *can* return a value.

And allows all programs written not to have the handler for the signals
in question to fall apart in a million pieces once the signal mechanism
is modified to expect a return value.  Yes, signal handlers should
return void rather than int.