#2 check which headers are needed where

[Paul Wise]

NetBSD has a patch that removes the use of malloc.h from helpdeco.h:

http://cvsweb.se.netbsd.org/cgi-bin/bsdweb.cgi/pkgsrc/textproc/helpdeco/patches/patch-aa?rev=HEAD

I think we need to review which headers are needed where, keeping in mind GCC's tendency to make headers more strict over time.