Accept an empty http_code as acceptance

git-svn-id: https://plugins.svn.wordpress.org/copyright-licensing-tools/trunk@901836 b8457f37-d9ea-0310-8a92-e5e31aec5664
Roll back hasty decisin on check_response

git-svn-id: https://plugins.svn.wordpress.org/copyright-licensing-tools/trunk@901838 b8457f37-d9ea-0310-8a92-e5e31aec5664