Only sc-inc-gpc and sc-set-gpt do exist. The mix-up sc-inc-gpt crept in
in 71d189219 (DOC: config: Rework and uniformize how TCP/HTTP rules are
documented, 2021-10-14) and got copied in a92480462 (MINOR: http-rules:
Add missing actions in http-after-response ruleset, 2023-01-05).