hm i can see that problem it would produce a lot of connections - how about getting player pings manually? Add a button "Get Pings" so if you wanna check for highpings once in a while you just hit the button and rcon is only bothered that one time.
File upload would be awesome!

edit: discovered a typo and a bug(?)
In the CVARs it should prolly read "Nextmap" instead of "Nexmap"

Changed that myself but might be included in next update

When trying to delete a servers password (removing all chars from old PW and press ENTER) it will always keep the last password used.
$3sv_password = $6testpassword $5[DUMPTODISK]$4