Upgraded:

Upgraded:

[1] UPGRADE: Add 'Upgraded' signal to requests. · 05e5358 · w3c/webappsec ( 版) <https://github.com/w3c/webappsec/commit/05e5358eddcce3981a9f1afc5ff31bebc568cfb4>

[2] UPGRADE: Drop the 'upgraded' header. · w3c/webappsec@1f9430f ( 版) <https://github.com/w3c/webappsec/commit/1f9430fe5624bdc28fb952e925b4c3aff0138157>