rendall, thank you kindly.
After 9 builds with increasing intensity to find where my headers were not going,
this is the answer.
Funny thing is that I was long using this in the callback, for critical headers; and yet
adding more later, got caught up in the toml and redirects doc. There ought to be
a cross-reference, or a link to both docs wherever you’re sent to find [one of the three sets of rules and ways] how to get your headers in.