* Support for PFS is enabled with help of chiper suits that use ECDHE
key exchange. OpenSSL added support for eliptic curve operations (EC)
in version 0.9.8. Note that there are also some library distributions
which don't support EC operations.
* Added precompiler guards for builds with OpenSSL older than 0.9.8 and
builds with '--enable-runtime-loading' configure script option.
* Cleaned up some SSL related code.