pfSense

Match pftop page exatly with privilege, there is no other page that glob would catch. Fixes #1845

Add proper validation to the services_rtadvd_configure() to only pick up the IPv6 nameservers if any
Ticket #1836

Also add the new RDNSS fields to the rtadvd config for prefix delegation cases.

Now that our rtadvd binary supports RDNSS we can tack the search domain and DNS servers onto the stack.
Ticket #1836

Encapsulate in curlies for safety

Unbreak system_routing_configure();

Only add the Interface scope on link local addresses

Add a / for the prefix length value. As suggested on
http://forum.pfsense.org/index.php/topic,40377.msg209028.html#msg209028

Only do cookie check if the form has already been posted. The cookie check is not accurate for the first page load after a browser has been opened, has to be at least one refresh/post first.

Unlink the failed downloaded file if present. Since it might contain harmful and not expected content