In the days before ANSI and POSIX, the signal functions were declared
in <sys/signal.h> and many programs still use that header.  

But the functions declarations for most signal functions (in fact, all
but signal() itself) have been moved to <signal.h> the NetBSD headers.
So a program that still uses <sys/signal.h> won't get the benefit of
those prototypes.  In fact, there are many NetBSD programs that still
use <sys/signal.h>.

I see several ways of handling this situation:

	* Ignore it.

	* Update the NetBSD programs to use <signal.h>, and don't
	  worry about third party programs.

	* Merge <signal.h> and <sys/signal.h>; then make a symlink
	  between /usr/include/signal.h and /usr/include/sys/signal.h.

	* ???

Please share your thoughts...

	--jtc