Fixes https://pagure.io/pagure/issue/2294
I'm not sure if it matters, but RFC-2919 uses a capital "I" as in "List-Id".
Edit: IANA says "List-ID"
Let's go with List-ID then
rebased
+1
Thanks :)
Pull-Request has been merged by pingou
Fixes https://pagure.io/pagure/issue/2294