* Fixes for udhcpc. Thanks to fedor for his help.
* Warn if saving an empty Access Restriction since it’s the same as blocking everything.
* Add option in Admin:Access to select which menus are permanently expanded.
* Increase PPPoE username and password length.
* Increase limit for web_printf to avoid problems handling very long variables.
* Update Dnsmasq to 2.55.
This is basically beta 1812 with an updated Dnsmasq.