Consider modifying Process_BENCHMARK_ClientServer to compare socket performance on the new OpenSSL socket implementation

There is a pre-existing benchmark in the libprocess benchmarks.cpp file called Process_BENCHMARK_ClientServer. We could have this benchmark make HTTPS connections en-masse as well, to check performance differences between the different implementations of our sockets.

We will have the following implementations:

• Libevent + OpenSSL (Posix & Windows)
• Libev + OpenSSL (Posix)
• Native Windows event loop + OpenSSL

Since the new OpenSSL socket defers work off onto libprocess worker threads, it will be interesting to see if performance improves or not.