Small patch attached.

1.) Patch enables the BPF JIT compiler via sysctl. 
BPF JIT offers around approximately 50ns speedup for BPF image executions per 
packet. [1][2]

[1] https://lwn.net/Articles/437981/
[2] http://carnivore.it/2011/12/28/bpf_performance

2.) Patch also standardizes on one interface configuration tool. A combination 
of ifconfig(1) and ip(1) were used.
My patch for sosetup-network removes the deprecated ifconfig(1) in favor of 
iproute2's  newer and better suited ip(1) tool. [1]

[1] http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2

Thanks
Jon