Log Message:
+ Don't build our own, very old version of hacked BSD curses -- just
  use other, better ones from pkgsrc through ncursesw/buildlink3.mk.

+ Add a configure script that lightly probes the system and write out
  some system-specific definitions for the Makefile.

This should fix PR pkg/29425.

+ Add necessary includes (<string.h> and <unistd.h>) to global.h to do
  silly C things like prototype functions before you use them.  Remove
  the unnecessary patches to lots of *.c files that added these same
  headers.

+ Include <string.h> in ss.c because it doesn't include global.h.

+ Move HTML documentation into ${PREFIX}/share/doc.

Bump the PKGREVISION to 2.