n2k15: tedu@ on rebound, malloc hardening, removing legacy code

The second n2k15 hackathon report comes from Ted Unangst (tedu@), who writes:

I don't usually get too involved with the network stack, but sometimes youfind yourself at a network hackathon and have to go with the flow. With manydevelopers working in the same area, it can be hard to find an appropriateproject, but fortunately there are a few dusty corners in networking land thatcan be swept up without too much disturbance to others.

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