OpenSSL is indeed no longer supported in Hiawatha. I moved away from OpenSSL because it's badly documented
[www.openssl.org]. It required some ugly callback stuff to make it work in a multi-threaded application, which Hiawatha is. PolarSSL on the other hand is well documented. It comes with a lot of example code, it has a cleaner API and is easier to learn and to understand.
Actually, when you've seen PolarSSL, you wonder why people still use OpenSSL.