Send aes key for the ad password with the adpass field only in the case of new client.  This is safe because the content of the data will be encrypted by the host's public key, which can only be decrypted by it's private key.  As these keys are regenerated on every reboot, theres very little chance of getting the AD Password.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2693 71f96598-fa45-0410-b640-bcd6f8691b32