ipfw status report - 3

[Tatsiana Elavaya]

Last week I've started rewriting optimization to use per rule
optimization instruction
Also:
* Introduced mergesort for linked lists algorithm
* Sort instructions before adding to rule, use listsort to sort groups
* Dynamically allocate optimization buffers
* Use sysctl to control optimization parameters
* Added extra debugging to check optimization correctness
* Handle F_NOT and F_OR instructions correctly
* Fixed bugs in rule alias handling

This week I'm going to finish rewriting optimization and checks to
verify optimization in kernel.