better hashing for 64 bits

git-svn-id: http://rfc5766-turn-server.googlecode.com/svn/branches/v3.2@1723 d3c6d0af-6456-5cbd-3218-6188ca4e956b
tls message fixed



git-svn-id: http://rfc5766-turn-server.googlecode.com/svn/branches/v3.2@1724 d3c6d0af-6456-5cbd-3218-6188ca4e956b
dtls fixes



git-svn-id: http://rfc5766-turn-server.googlecode.com/svn/branches/v3.2@1725 d3c6d0af-6456-5cbd-3218-6188ca4e956b