Feature/routedns

does away with all the resolveconf nightmare by simply rerouting dns packets instead of blocking them. no need to ever change /etc/resolv.conf again!

sometimes one follows the correct path only once all other paths have been exhausted.
Missing `()`, but regardless, this should be:

```python
with open('/proc/sys/net/ipv4/ip_forward', 'w') as f:
    f.write('1\n')
````