Howto rename an interface

[Vincent Jardin]

I would like to rename the network interfaces. More particularly, I would like 
to control the numbers in the name and to remove the constraints.

For example, what are the issues about renaming my 'vr0' interface to eth1-3 
or DSL-WAN that does not have a ifunit within its name ?

I think about the following issues, what am I forgetting ?
  - update all the sockaddr_dl
  - many drivers, in fact all of them, log with %s%d, ifname, ifunit
  - (add a message on the routing socket)

Regards,
  Vincent