The format value has to be a string literal, every time.
Otherwise, you are not using these functions correctly. To reinforce this fact, I putrestrict over every non-contrib example of this I could find.
Renamed __malloc -> sudo_malloclike, __printflike -> sudo_printflike,
__printf0like -> sudo_printf0like.
Add sudo_noreturn instead of __attribute__((__noreturn__)).
We do not use stdnoreturn.h since it has been deprecated in C23
in favor of the [[noreturn]] attribute.
The hook can be used to log parser errors (sudoers module) or keep
track of which files have an error (visudo).
Previously, we only kept track of a single parse error.
There's no point in warning about the same problem multiple times.
This implementation assumes a small number of warnings and so just
uses a simple listed link.
