Rules not taking effect under ICS

```
What steps will reproduce the problem?
1. Set mode to blacklist
2. Select apps to block, enable firewall &apply rules
3. Run blocked apps

What is the expected output? What do you see instead?
Block not taking effect; ads still showing in them

What version of the product are you using? On what operating system?
1.5.7 on Ice Cream Sandwich

Please provide any additional information below.
droidwall chain must be INSERTED to beginning of OUTPUT chain to work, not
ADDed to the end.
```

Original issue reported on code.google.com by `buu...@gmail.com` on 20 Dec 2011 at 12:22