Option to force a user to change his password (#3872).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12081 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/user.rb

@@ -280,6 +280,10 @@ class User < Principal
     return auth_source.allow_password_changes?
   end
 
+  def must_change_password?
+    must_change_passwd? && change_password_allowed?
+  end
+
   def generate_password?
     generate_password == '1' || generate_password == true
   end
@@ -568,6 +572,7 @@ class User < Principal
   safe_attributes 'status',
     'auth_source_id',
     'generate_password',
+    'must_change_passwd',
     :if => lambda {|user, current_user| current_user.admin?}
 
   safe_attributes 'group_ids',