RabbitMQ: JSONReader in the default JSON-RPC mapper never terminates on truncated input, causing DoS

Summary com.rabbitmq.tools.json.JSONReader.read never returns when its input ends inside a quoted string or a // line comment. Both scanners walk the input with StringCharacterIterator.next but only compare against a delimiter, so once the iterator reaches CharacterIterator.DONE ￿ they loop...