P2331 Unsequenced functions

[wg21bot]

P2331R0 Unsequenced functions (Étienne Alepins, Jens Gustedt)

[AaronBallman]

https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2956.htm was adopted into C23, so closing this issue as I don't expect to see a future revision of this paper.