Add a note about needsPassword role and shadow

plfiorini · plfiorini · commit 078662108007 · 2015-06-21T12:32:24.000+02:00
The flag will always be true when shadow is used because pw_passwd
will contain 'x' even if the password was erased.

When shadow is used we'll still see the password prompt but we'll
be able to login just pressing enter.
diff --git a/src/greeter/UserModel.cpp b/src/greeter/UserModel.cpp
@@ -76,6 +76,8 @@ namespace SDDM {
             user->homeDir = QString(current_pw->pw_dir);
             user->uid = int(current_pw->pw_uid);
             user->gid = int(current_pw->pw_gid);
+            // if shadow is used pw_passwd will be 'x' nevertheless, so this
+            // will always be true
             user->needsPassword = strcmp(current_pw->pw_passwd, "") != 0;
 
             // search for face icon
