TODO(nickm) writeme
+7. Infrastructure improvements
+7.1. Better unit test framework
+ We now use a unit test framework that Nick wrote called "tinytest".
+ The main benefit from Libevent's point of view is that tests which
+ might mess with global state can all run each in their own
+ subprocess. This way, when there's a bug that makes one unit test
+ crash or mess up global state, it doesn't affect any others.
+
+7.2. Better unit tests
+
+ Despite all the code we've added, our unit tests are much better
+ than before. Right now, iterating over the different backends on
+ my MacBook, I'm getting around 75% test coverage, compared with
+ less than 45% test coverage in Libevent 1.4.
+
+ (Right now, evdns.c has the worst test coverage of any significant
+ module, at 57%. If we exclude it from consideration, we're at 80%
+ test coverage, which is fairly good for a networking library.)