don't free a download loop until all downloads are unref'ed
don't free a download loop until all downloads are unref'ed

syndicate-storage/syndicate-core,syndicate-storage/syndicate-core,iychoi/syndicate-core,iychoi/syndicate-core,syndicate-storage/syndicate-core,iychoi/syndicate-core,iychoi/syndicate-core,syndicate-storage/syndicate-core