DHCP and PPPoE
Problem:
Cannot set mode to DHCP or PPPoE when HA is on.
Note: this is allegedly supported in 5.2.1 or higher, but there are other
problems with this firmware that prevent me from confirming this.
**Update:** With 5.2.2 I can at least set the option, I don't know if it
actually works yet.
**Update 2:** I can do PPPoE with a HA cluster. Fail-over has not been tested
as of yet.