Replace hardcoded int with its corresponding constant

cron/phishing_tests.php

@@ -10,7 +10,7 @@ try{
 $ch=curl_init();
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($ch, CURLOPT_PROXY, PROXY);
-curl_setopt($ch, CURLOPT_PROXYTYPE, 7);
+curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 25);
 curl_setopt($ch, CURLOPT_TIMEOUT, 40);