ipv6: Add small description to the v6eval setup script
ipv6: v6eval-env: make the script more configurable
ipv6: v6eval-env: make bridge names configurable
ipv6: v6eval-env: allow starting a test environment for host or router

The first argument to the script can be "host" or "router".
Without it, it defaults to "router".
ipv6: v6eval-env: add missing files to the /etc base

These are needed on Linux Mint/Ubuntu.
ipv6: v6eval-env: allow a configurable kernel build directory

It is not needed anymore to install guest modules in /lib
on the host filesystem.
ipv6: v6eval-env: restructure the root filesystem of the VM
ipv6: v6eval-env: move all test code outsite main script
ipv6: v6eval-env: add new vm root filesystem
ipv6: add script to get, configure and build a kernel
ipv6: add script which runs the tests automatically

First the kernel is downloaded, built and configured.
Then the VMs are started, configured and the tests are ran.
ipv6: v6eval: don't set the link down
ipv6: v6eval: short make-kernel usage
ipv6: v6eval: add kernel config used by make-kernel