add hcaptcha support

inc/config.php

@@ -297,6 +297,7 @@
 		'raw',
 		'embed',
 		'g-recaptcha-response',
+		'h-captcha-response',
 		'captcha_cookie',
 		'captcha_text',
 		'spoiler',
@@ -324,6 +325,10 @@
 	$config['recaptcha_public'] = '6LcXTcUSAAAAAKBxyFWIt2SO8jwx4W7wcSMRoN3f';
 	$config['recaptcha_private'] = '6LcXTcUSAAAAAOGVbVdhmEM1_SyRF4xTKe8jbzf_';
 
+	// Public and private key pair for using hCaptcha.
+	$config['hcaptcha_public'] = '7a4b21e0-dc53-46f2-a9f8-91d2e74b63a0';
+	$config['hcaptcha_private'] = '0x4e9A01bE637b51dC41a7Ea9865C3fDe4aB72Cf17';
+
 	// Enable Custom Captcha you need to change a couple of settings 
 	//Read more at: /inc/captcha/readme.md
 	$config['captcha'] = array();