Convert web page with JSON-LD Recipe data to Meal-Master format.

Usage: awk -f jsontomm.awk infile.htm outbase
Creates outbase.js and outbase.txt

Hints
=====
To fetch a recipe, use curl:
curl --insecure -o web.htm URL

On DOS, use GAWK.EXE.  This script uses pipes and unicode, which
don't work so well in older versions of awk.

This script depends on json2tsv being in your path.

<gopher://tilde.pink/1/~bencollver/files/dos/util/json2tsv/>

Use MMBUSTER.EXE to convert outbase.txt to outbase.mmf for import into
Meal-Master.

JSON-LD spec
<https://developers.google.com/search/docs/appearance/structured-data/
recipe>