Free the free substreams when the session dies
Free the free substreams when the session dies

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