IPv4 loopback address is missing, why?

[Len Conrad]

and we can do this, too:

ifconfig lo 127.0.0.1 netmask 255.0.0.0 up

then ifconfig shows:

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
         inet6 ::1 prefixlen 128
         inet 127.0.0.1 netmask 0xff000000

thanks
Len