Simplified local IP reordering patch for default routes

[Bruno Jesus]

Hi, Jamie and Joachim and list. This is a short version of a long
patch I'm working on, it orders the IP list with the default routes on
top and it supports more than one default route. It fixes the problem
on Linux and FreeBSD, could anyone also test it on OSX, please?

This patch does not touch the magic IP so the loopback route will
still return the IP 127.12.34.56 but at least it won't be the first
one anymore.

Thanks in advance,
Bruno