Patch for CVE-2010-0541

Index: httpresponse.rb
===================================================================
--- lib/webrick/httpresponse.rb	(revision 28759)
+++ lib/webrick/httpresponse.rb	(working copy)
@@ -208,7 +208,7 @@
         @keep_alive = false
         self.status = HTTPStatus::RC_INTERNAL_SERVER_ERROR
       end
-      @header['content-type'] = "text/html"
+      @header['content-type'] = "text/html; charset=ISO-8859-1"
 
       if respond_to?(:create_error_page)
         create_error_page()