c-ares contributions

I was credited in the c-ares 1.7.0 release notes. Very minor changes, but it's nice to be contributing to the open source community again.

Thanks go to these friendly people for their efforts and contributions:

Phil Blundell, Japheth Cleaver, Yang Tse, Gregor Jasny, Joshua Kwan,
Timo Teras, Jakub Hrozek, John Engelhart, Larry Lansing