New Features
- Support UDP server.
- Enable erasing http message's header.
Improvements
- Optimize JSON parsing.
- Support specifying server's transport layer protocol (TCP, UDP, SCTP).
- Reduce default DNS cache ttl.
- Kafka client supports set_offset_timestamp for KafkaToppar in automatic mode.
Bug Fixes
- Fix dead lock bug when upstream referring to a host name.
- Fix some kafka client little problems.