[syslog-ng]encryption or hashing implemented?

I've noticed passing mention to this functionality, and i've not been able to see it implemented or documented anywhere else. A quick grep of the source reveals nothing of hashing, and a "not implmented yet" for encryption. This was in 1.4.17. is this functionality to be found in the 1.5 branch? If not, could someone point me towards the files i could modify to add hashing? Thanks. Thanks in advance, Blaise St-Laurent