recaptcha: Update to Google recaptcha API v2 (Issue #313) Recaptcha stopped working. It was using google recaptcha v1, and https://developers.google.com/recaptcha/docs/faq says: "Any calls to the v1 API will not work after March 31, 2018." Note: 1) Not using 'async defer' - it's not used anywhere else, plus I have no idea of what exactly it does. 2) The recaptcha div has an ID so the label for="recaptcha_field" can reference it (although I'm not certain a div can technically have a label, but it's better than removing the label, or the for="").