I have abused esc_url_raw for a long time; I should use esc_url instead... really embarrassing. http://codex.wordpress.org/Function_Reference/esc_url_raw#Examples 

git-svn-id: https://plugins.svn.wordpress.org/contact-form-7/trunk@904445 b8457f37-d9ea-0310-8a92-e5e31aec5664