Log Message:
- Specify ISO-8859-1 encoding on a couple Texinfo docs that aren't UTF8.
  Fixes `utf8 "\\xF6" does not map to Unicode` that was breaking \ 
SmartOS bulk builds.
- Use afplay(1) on macOS (included since 2007) instead of deprecated audio/qtplay.
  Other platforms still need to define default audio players.
- Include librsvg to get the gdk-pixbuf SVG loader for solvege.svg.
- Bump PKGREVISION.