Return an error if a NULL cname is passed
Return an error if a NULL cname is passed

ahmedammar/skype_farsight2,kakaroto/farstream,shadeslayer/farstream,pexip/farstream,tieto/farstream,ahmedammar/skype_farsight2,tieto/farstream,shadeslayer/farstream,ahmedammar/skype_farsight2,tieto/farstream,tieto/farstream,kakaroto/farstream,tieto/farstream,pexip/farstream,pexip/farstream,shadeslayer/farstream,shadeslayer/farstream,pexip/farstream,kakaroto/farstream,ahmedammar/skype_farsight2,kakaroto/farstream