libevent based C++17 https test server harness
Generate private/public keys:
openssl req -newkey rsa:4096 -nodes -keyout key.pem -x509 -days 365 -out certificate.pem
Build the test server:
cc -std=c++17 -g -o server server.cpp -DEVENT__HAVE_OPENSSL -lssl -lcrypto -levent -levent_openssl -lc++