[PATCH] nss: remove undefined behavior and optimize getaddrinfo

[Collin Funk]

Cristian Rodríguez <cristian@rodriguez.im> writes:

> all the BSD have a fls* public functions in libc so adding one in
> glibc may reduce duplication.

The fls* functions are extensions that pre-date <stdbit.h> added by C23.

I don't really think it is worth adding these functions now. I would
prefer <stdbit.h> over ffs* even, but those are required by POSIX.1-2024
XSI anyways [1].

Collin

[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/ffs.html