[build](https://ci.appveyor.com/project/nmathewson/libevent/build/2.1.6.271) So tests passes without [ssl](https://ci.appveyor.com/project/nmathewson/libevent/build/2.1.6.271/job/ykn5gyq4lcl3l026) but not under [cmake](https://ci.appveyor.com/project/nmathewson/libevent/build/2.1.6.271/job/wvy2jp7uojcut5cx)