Generating [submit_time] tag for CF7 email is now an option and off by default to avoid submissions being flagged as spam

git-svn-id: https://plugins.svn.wordpress.org/contact-form-7-to-database-extension/trunk@996585 b8457f37-d9ea-0310-8a92-e5e31aec5664
Running GET/POST parameters through filter_var() to guard against XSS

git-svn-id: https://plugins.svn.wordpress.org/contact-form-7-to-database-extension/trunk@996586 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version: 2.8.16

git-svn-id: https://plugins.svn.wordpress.org/contact-form-7-to-database-extension/trunk@996587 b8457f37-d9ea-0310-8a92-e5e31aec5664