Fix void main. While here:
  - add various LP64 fixes;
  - use stdlib.h as needed instead of casting the return value of malloc;
  - fix fake-varargs printf code and use stdarg.h;
  - use system snprintf instead of included custom one;
  - tidy up symbol name conflict with log();
  - add patch comments;
  - remove some pkglint;
  - add LICENSE.

PKGREVISION -> 2.

(dholland)