Major fix: In FastCGI mode the server address could not be set

Due to a bug in the FastCGI server the start up of the server with
a specific IP address was not possible.
Example:
`hhvm --config /etc/hhvm/server.hdf -m server -vServer.Type=fastcgi -vServer.IP=127.0.0.1 -vServer.Port=9100`

Before bugfix:
```
netstat -tulpen|grep 9100
> tcp6       0      0 :::9100                 :::*                    LISTEN
```

After bugfix:
```
netstat -tulpen|grep 9100
> tcp        0      0 127.0.0.1:9100          0.0.0.0:*               LISTEN
```