Adjust mlterm font config files.

- font
 - use efont-unicode biwidth fonts for DEFAULT and ISO10646_USC4_1
 - set ISO10646_UCS4_1_BIWIDTH as well

- font-fb
 - comment out DEFAULT b16.pcf.gz for now
 - set JISX0213_2000_1 and JISX0213_2000_2 aliases
 - add commented out JISX0213_2000_1 and JISX0213_2000_2 entries
   using pkgsrc/fontsjisx0213fonts
 - add comments
Add /usr/pkg/lib/X11/fonts/efont/ to font path.
Add misc commented out entries.
 - PKG_VERBOSE=yes for development
 - BINPKG_SITES and DEPENDS_TARGET=bin-install for builds using binaries
   for dependencies
 - add comments
Add commented out WRKOBJDIR.