zfs code - Jan 2008 - PROP_TYPE_BINARY or base64 encode to PROP_TYPE_STRING

For storing the wrapped per dataset encryption keys as a (hidden) 
property I have been using PROP_TYPE_STRING.  However this isn''t really
correct since they aren''t strings but binary data.

Should I a) add PROP_TYPE_BINARY - which I would likely map to 
uint8_array for nvlists.

Or b) base64 encode the wrapped key and store it in PROP_TYPE_STRING


-- 
Darren J Moffat