SETUSERKEY (user) :key
----------------------
sets an encryption key to your client. The connection always will be kept
encrypted and cant be resetted to nonencrypted. The parameter (user)
can only be used by a bouncer admin.
WARNING: 
You need to use a special encryption client with the same password set 
which allows to process those encryptions. You will find a client for linux and
a client for windows at www.psychoid.lam3rz.de (psyPipe).
Example:
/SETUSERKEY :encryptionkey
or for an admin:
/SETUSERKEY john :encryptionkey