Add support to get and set ciphers on SSL instance.

Motivation:

At the moment it is only possible to set the cipher suites to use on the SSLContext while it sometimes is needed to set it explicit on SSL.

Modifications:

Add SSL.setCipherSuites(...) and SSL.getCiphers()

Result:

It's now possible to set and get ciphers on SSL
'for negation in the SSL handshake' -> 'for negotiation in an SSL handshake'