- Add ability to communicate with Tor control port and close circuits. Can be called from lua or as a http-request lua... call to do it based off an ACL. close #16

- Make POW checked before captcha in POST handler, since they both must be submittedin captcha mode, we don't want to send POST to /siteverify if they didnt even solve the POW

Other:
- Change (improve) split util to leave empty table entries for repeated delimiters
- Minor frontend script bugfix so error messages display properly in captcha mode
- Wrap submit button of noscript pow form to next line

haproxy/js/challenge.js

@@ -1,7 +1,9 @@
 function insertError(str) {
 	const ring = document.querySelector('.lds-ring');
-	ring.insertAdjacentHTML('afterend', `<p class="red">Error: ${str}</p>`);
-	ring.remove();
+	const captcha = document.querySelector('#captcha');
+	(ring || captcha).insertAdjacentHTML('afterend', `<p class="red">Error: ${str}</p>`);
+	ring && ring.remove();
+	captcha && captcha.remove();
 }
 
 function finishRedirect() {