packages: create UCL files for package descriptions

Mechanically convert Makefile.package into individual UCL files for each
package and delete it.

Move handling of the 'comment' and 'desc' fields

packages: create UCL files for package descriptions

Mechanically convert Makefile.package into individual UCL files for each
package and delete it.

Move handling of the 'comment' and 'desc' fields from generate-ucl.sh to
template.ucl; this provides the default values for some packages which
don't have a UCL file yet.

Reviewed by: des, bapt, emaste
Approved by: des (mentor)
Differential Revision: https://reviews.freebsd.org/D50280

show more ...