package/sudo: Enable libxcrypt with glibc, allowing hashed passwords without PAM
Per https://gitlab.com/buildroot.org/buildroot/-/issues/27 , on glibc
builds without PAM, sudo will "fail" all password prompts.
It was found that it's simply checking the entered string against the
raw hash, because 'libcryp' isn't available. On glibc, we need libxcrypt,
so enable it and ensure sudo is built with it.
musl and uclibc do have crypt() functions, so this is not needed.
Relevant code from sudo:
https://github.com/sudo-project/sudo/blob/v1.9.17p1/plugins/sudoers/auth/passwd.c#L139
Signed-off-by: Nathaniel Roach <nroach44@nroach44.id.au>
Signed-off-by: Julien Olivain <ju.o@free.fr>
Nathaniel Roach
6044cc5f26