BPF JIT addition to /etc/sysctl.d/10-securityonion.conf

```
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


# Enable BPF JIT Compiler (approx. 50ns speed up)
net.core.bpf_jit_enable = 1
```

Original issue reported on code.google.com by `doug.bu...@gmail.com` on 11 Dec 2013 at 6:57
