Import dhcpcd-6.6.5 with the followng changes:
  *  Allow STOPPED to be processed by dhcpcd-run-hooks(8)
  *  Don't attempt to match IFT to ARP types directly
  *  If neither dig nor host are present, fallback to getent(1)
  *  If IFF_UP is not set when we get a carrier up event, poll for it
     instead of giving up
  *  Failure to bind to the DHCP port on the wildcard address when
     it's in-use is not an error