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- Updated to OpenBSD 5.5
- OpenBSD 5.5 has a new queueing system; thus all the queue classes
(`PFAltqCBQ`, `PFAltqHFSC` and `PFAltqPriQ`) and the corresponding stats
classes (`CBQStats`, `HFSCStats` and `PriQStats`) have been replaced by the
`PFQueue` and `PFQueueStats` classes respectively.
- Methods for retrieving and adding queues in the `PacketFilter` class (i.e.
`get_altqs()` and `add_altqs()`) have been replaced (by `get_queues()` and
`load_queues()` respectively). Queues are now cleared along with rules, so
the `clear_altqs()` method has been removed.