$wgGroupPermissions['autoconfirmed']['skipcaptcha'] = false;
$wgGroupPermissions['bot' ]['skipcaptcha'] = true; // registered bots
$wgGroupPermissions['sysop' ]['skipcaptcha'] = true;
+$wgAvailableRights[] = 'skipcaptcha';
/**
* List of IP ranges to allow to skip the captcha, similar to the group setting: