provide SP metadata download URL to my IDP

[Peter Schober]

* Jason Howe <jhowe at cs.washington.edu> [2020-04-06 18:54]:
> 1) I download the autogenerated metadata file and save it off to the side.

Or use the provided metagen.sh (or shib-metagen, on Debian) script to
generate it. And/Or use $EDITOR to tune further. Or XSLT.

-peter