Follows-up 7c2c016e46 (I086e275148). This separates the link from
the response such that when it gets copied elsewhere, hosted elsewhere,
saved offline, proxied, archived, or otherwise served from a different
place or with different content; the header is most likely naturally
not copied along.
This is based on upstream experience by the jQuery Team where e.g.
distributions of jQuery, or concatenations, etc would lead to
confusing errors or inability to see any source in the devtools.
In the Wikimedia community we two similar use cases:
1. people sometimes copy load.php responses to a wiki page, e.g.
as a way to "distribute" a ResoureLoader-built gadget or to
fork/debug some core code.
2. the Internet Archive stores copies of our responses, but doesn't
proactively download source map links.
For example, archiving
https://people.wikimedia.org/~krinkle/wikimedia-minify-2.5.0-test-sourcemap/combine.html
results in:
> … /~krinkle/wikimedia-minify-2.5.0-test-sourcemap/combine.html
> … /~krinkle/wikimedia-minify-2.5.0-test-sourcemap/combine.min.js
> Archived at
> http://web.archive.org/web/20230905211332/https://people.wikimedia.org/~krinkle/wikimedia-minify-2.5.0-test-sourcemap/combine.html
Bug: T47514
Change-Id: I3e85c2afb107ce1185651ab038379e4abe87a445
30f515ec1d