librdkafka, libfds, ipfixcol2

[Chris Cappuccio]

These ports are to support IPFIXcol2 which is the first set of ports I've
done in a long time. CMake and all those extra layers of abstraction are a
bit of a pain in the ass. Can somoene please take a look and let me know how
close I am getting to the mark here? Is this stuff close to an acceptable
condition?