fedora: allow root logins

It's an issue that comes up over and over again.

Give in to the peer pressure and allow root login
by default. We warn in gnome-session now anyway.

data/pam-redhat/gdm-fingerprint.pam

 auth        substack      fingerprint-auth
-auth        required      pam_succeed_if.so user != root quiet
 auth        include       postlogin
 
 account     required      pam_nologin.so

data/pam-redhat/gdm-password.pam

 auth     [success=done ignore=ignore default=bad] pam_selinux_permit.so
 auth        substack      password-auth
-auth        required      pam_succeed_if.so user != root quiet
 auth        optional      pam_gnome_keyring.so
 auth        include       postlogin
 

data/pam-redhat/gdm-smartcard.pam

 auth        substack      smartcard-auth
-auth        required      pam_succeed_if.so user != root quiet
 auth        include       postlogin
 
 account     required      pam_nologin.so

data/pam-redhat/gdm.pam

 #%PAM-1.0
 auth       required    pam_env.so
-auth       required    pam_succeed_if.so user != root quiet
 auth       sufficient  pam_succeed_if.so user ingroup nopasswdlogin
 auth       include     system-auth
 account    required    pam_nologin.so