- Add support for displaying arbitrary socket addresses. - Teach ifconfig to list vlan-specific details for subinterfaces. - Add a 'maddr' to list the multicast addresses a given interface is   subscribed to.
- Add support for displaying arbitrary socket addresses.
- Teach ifconfig to list vlan-specific details for subinterfaces.
- Add a 'maddr' to list the multicast addresses a given interface is
  subscribed to.

bsdjhb/kdbg,bsdjhb/kdbg