dynamicdns: Fix starting daemon for no NAT
dynamicdns: Fix starting daemon for no NAT

Incase the machine is not behind NAT, fix the logic that decides to
start the daemon.

kkampardi/Plinth,freedomboxtwh/Plinth,kkampardi/Plinth,freedomboxtwh/Plinth,freedomboxtwh/Plinth,vignanl/Plinth,freedomboxtwh/Plinth,harry-7/Plinth,harry-7/Plinth,harry-7/Plinth,vignanl/Plinth,kkampardi/Plinth,harry-7/Plinth,kkampardi/Plinth,freedomboxtwh/Plinth,vignanl/Plinth,vignanl/Plinth,kkampardi/Plinth,harry-7/Plinth,vignanl/Plinth