remote dhcp: Autodetects without -A
The -A option is not valid in dhcp mode, see:
But if no interface name (-I) or mac address (-m) is provided, autodetect is attempted by selecting the first interface that's in state IFF_UP and IFF_RUNNING, see:
I think the right thing to do is: add the -A option for dhcp, only autodetect if it is provided.
(What I'd like to avoid is: being "helpful" in dhcp but not in static.)