Fix bug unsubscribing from libbitcoin
Fix bug unsubscribing from libbitcoin

cpacia/OpenBazaar-Server,cpacia/OpenBazaar-Server,cpacia/OpenBazaar-Server,OpenBazaar/Network,OpenBazaar/OpenBazaar-Server,OpenBazaar/Network,saltduck/OpenBazaar-Server,saltduck/OpenBazaar-Server,OpenBazaar/OpenBazaar-Server,OpenBazaar/Network,OpenBazaar/OpenBazaar-Server,saltduck/OpenBazaar-Server