If there are many enabled flags, ifconfig divides flags output into
multiple formatted strings due to snprintb_m, e.g.,
wm0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX>wm0: flags=8b43<MULTICAST> mtu 1500
This behavior is probably unexpected. The change always outputs enabled
flags at once like this:
wm0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500