Log Message:
General cleanup, via a distfile patch.
   - NULL is a pointer. Don't use it for '\0', which is a character.
   - Silence warnings about unused variables.
   - Silence clang warnings about format strings.
   - Fix up the makefile and configure logic, rolling in patch-aa and
     patch-ab. Make the configure script report what it's doing instead
     of making wrong decisions silently.
   - Fix broken build when using system curses instead of the builtin
     curses subset. (This is not the default, nor apparently recommended,
     but can happen if the configure script doesn't like you.)
   - Bump PKGREVISION.