Implemented encryption layer and some basic licensing negotiation.
Reorganised code somewhat. While this is not quite as clean, it is
a lot faster - our parser speed was becoming a bottle-neck.
git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@9 423420c4-83ab-492f-b58f-81f9feb106b5
