Undef USERFILE when we don't need it any more
Undef USERFILE when we don't need it any more

eworm-de/yubico-pam,madrat-/yubico-pam,Yubico/yubico-pam,madrat-/yubico-pam,madrat-/yubico-pam,eworm-de/yubico-pam,eworm-de/yubico-pam,Yubico/yubico-pam,Yubico/yubico-pam