commit 9abfa3f135f62515557c78cc182dcc3a683c125e
Author: Claudio Jeker <claudio@openbsd.org>
Date: 2023-08-30 10:46:34 +0200
Never ever trust the linux documentation, it is full of lies!
While RTA_METRICS is everywhere documented as type `int` it is not.
It seems to be an array of ints but who knows, there is no documentation,
not even in the header files.