Format of custom headers glob

Support
5

It’s definitely working? Here’s a rule in my netlify.toml:

[[headers]]
for = "/*.(css|ttf|ttc|otf|eot|woff|woff2)"
[headers.values]
Cache-Control = "public, max-age=31536000, immutable" # 1 year

And the output of curl -I for my CSS:

HTTP/2 200
accept-ranges: bytes
content-length: 66555
content-type: text/css; charset=UTF-8
date: Tue, 28 Apr 2020 14:24:32 GMT
etag: "3b33c3acedf8c2e98f4f5907cec086c6-ssl"
strict-transport-security: max-age=31536000
age: 0
server: Netlify
cache-control: public,max-age=31536000,immutable
x-nf-request-id: 8cd9eb23-8765-473d-b4eb-11f0a8bd611c-7325384

The Netlify CDN can’t have just coincidentally decided to add cache-control immutable, so the glob must be doing something…