User Sync Relation sets unideal owner

If someone enables creation of contacts on user creation or uses the sync manager by hand, relate() first checks for a contact. When no contact is found one can be created, this contact receives as an owner the user account itself.

This should not be the case, rather the current user should be the owner and only the relation should interrelate contact and user.

This is also an easy pitfall since developers can assume that the uid they are seeing is the actual relationship when it isn't.