Relevant BUGIDs:

Relevant BUGIDs:

Purpose of commit: refactorization

Commit summary:
---------------
        * modules/pam_unix/pam_unix_acct.c (_unix_run_verify_binary): Return
        status and daysleft instead of fake shadow entry.
        (pam_sm_acct_mgmt): Call _unix_run_verify_binary() appropriately.
        * modules/pam_unix/pam_unix_passwd.c (_unix_verify_shadow): Call
        get_account_info() and check_shadow_expiry().
        * modules/pam_unix/support.h: Adjust _unix_run_verify_binary()
        prototype.
        * modules/pam_unix/support.c (_unix_run_helper_binary): Remove check
        on selinux enabled/disabled.
        * modules/pam_unix/unix_chkpwd.c (_verify_account): Rename to
        _check_expiry(), now checks shadow expiry info.
        (main): Remove check on selinux enabled/disabled. Check shadow
        expiry through _check_expiry().