Move libpam-sys helpers into their own library. - Renames libpam-sys-helpers to libpam-sys-consts. - Moves libpam-sys-helpers::helpers into libpam-sys-helpers, which moves them completely out of libpam-sys's dependency chain. - Moves the aliases from libpam-sys into libpam-sys::aliases.

--- a/libpam-sys/build.rs	Sun Jul 06 19:23:02 2025 -0400
+++ b/libpam-sys/build.rs	Mon Jul 07 12:11:43 2025 -0400
@@ -1,6 +1,4 @@
-#![allow(unexpected_cfgs)]
-
-use libpam_sys_helpers::pam_impl;
+use libpam_sys_consts::pam_impl;
 
 fn main() {
     println!("cargo:rustc-link-lib=pam");