the descriptions of MOTIF_TYPE and MOTIFBASE lost during the
mk.conf.example --> bsd.pkg.defaults.mk conversion. Also,
document MOTIF_TYPE_DEFAULT and MOTIF12_TYPE_DEFAULT which are
used as the final default values for MOTIF_TYPE and MOTIF12_TYPE.
Note: none of these values need to be explicitly set, as
motif.buildlink.mk will choose sensible values for all of these
variables.
This file is "included" automatically before <bsd.own.mk> includes
/etc/mk.conf, so that pkgsrc-wide default values are set.
It is now possible just to set values in mk.conf only where they differ
from the default, thereby easing the problems of updating mk.conf when
new values get added.
