Test case for 0848814ac49616 "I'm not sure if you'll like my use of the limited broadcast address for simulating an ENETUNREACH error with a TCP connection, but it's the best that I could think of. Basically, we want to trigger a non-EINPROGRESS error in evutil_socket_connect() immediately at the connect() in order to bring about the assertion in the evhttp_connection_fail() error handling code."