Don't allow banned ip addresses to make changes

Previously banned ip addresses couldn't make new accounts, but if they
get an account somehow the ip ban wouldn't prevent them from making
edits.

app/controllers/application_controller.rb

@@ -118,7 +118,7 @@ protected
 
   %w(member banned builder gold platinum janitor moderator admin).each do |level|
     define_method("#{level}_only") do
-      if !CurrentUser.user.is_banned? && CurrentUser.user.__send__("is_#{level}?")
+      if !CurrentUser.user.is_banned_or_ip_banned? && CurrentUser.user.__send__("is_#{level}?")
         true
       else
         access_denied()

app/logical/anonymous_user.rb

@@ -40,6 +40,10 @@ class AnonymousUser
     false
   end
 
+  def is_banned_or_ip_banned?
+    false
+  end
+
   def has_mail?
     false
   end

app/models/user.rb

@@ -75,6 +75,10 @@ class User < ActiveRecord::Base
   accepts_nested_attributes_for :dmail_filter
 
   module BanMethods
+    def is_banned_or_ip_banned?
+      return is_banned? || IpBan.is_banned?(CurrentUser.ip_addr)
+    end
+
     def validate_ip_addr_is_not_banned
       if IpBan.is_banned?(CurrentUser.ip_addr)
         self.errors[:base] << "IP address is banned"