Update list editing commands

Updates from using `whitelist.sh` and `blacklist.sh` to
using `pihole`. Currently includes sudo in command, but
after the scripts get updated with sudo checking that
should not be needed.

php/add.php

@@ -4,9 +4,9 @@ if(!isset($_GET['domain'], $_GET['list']))
 
 switch($_GET['list']) {
     case "white":
-        exec("/usr/local/bin/whitelist.sh -q ${_GET['domain']}");
+        exec("sudo pihole -w -q ${_GET['domain']}");
         break;
     case "black":
-        exec("/usr/local/bin/blacklist.sh -q ${_GET['domain']}");
+        exec("sudo pihole -b -q ${_GET['domain']}");
         break;
 }