[gdm] data: allow password-auth to be disabled

[Ray Strode <halfline src gnome org>]

commit c4642e7e83f2b3e07a867391917890dac7fa96c0
Author: Ray Strode <rstrode redhat com>
Date:   Sun Jul 28 21:33:21 2013 -0400

    data: allow password-auth to be disabled
    
    it could be you want one of the other methods to be strictly required.
    This commit just adds the config key for checking that.

 data/org.gnome.login-screen.gschema.xml.in |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.login-screen.gschema.xml.in b/data/org.gnome.login-screen.gschema.xml.in
index e837291..b623e7a 100644
--- a/data/org.gnome.login-screen.gschema.xml.in
+++ b/data/org.gnome.login-screen.gschema.xml.in
@@ -20,6 +20,16 @@
         to log in using those smartcards.
       </_description>
     </key>
+    <key name="enable-password-authentication" type="b">
+      <default>true</default>
+      <_summary>
+        Whether or not to allow passwords for login
+      </_summary>
+      <_description>
+        The login screen can be configured to disallow password authentication,
+        forcing the user to use smartcard or fingerprint authentication.
+      </_description>
+    </key>
     <key name="logo" type="s">
       <default>''</default>
       <_summary>