Implement 'honor_cipher_order' SSL server-side option

HonorCipherOrder as implemented in Apache, nginx, lighttpd, etc. This
instructs the server to prefer its own cipher ordering rather than the
client's and can help protect against things like BEAST while
maintaining compatability with clients which only support older ciphers.

This code is mostly written by Andrew Thompson, only the test case was
added by Andreas Schultz.

This is a rework of #111 against master.