v3.4.0

Features

• Add an example for icmp6 (Jianhui Zhao)
• socket: add support multicast (Jianhui Zhao)
• socket: Add support send and recv in a socket concurrently (Jianhui Zhao)
• socket: automatically detects the IP address type for connect (Jianhui Zhao)
• bump version 3.4.0 (Jianhui Zhao)

Bug Fixes

• examples: fix typo (Jianhui Zhao)
• ip: Fix parse ipv6 address (Jianhui Zhao)
• socket: ev_io and ev_timer should be stoped in close. (Jianhui Zhao)
• http.client: remove unnecessary code (Jianhui Zhao)
• log: Fix compilation with musl libc 1.2.5 (Jianhui Zhao)
• socket: Fix return value of send and sendfile (Jianhui Zhao)
• socket: force schedule lua coroutine in send function. (Jianhui Zhao)

Performance Improvements

• ubus: use ligh userdata instead of userdata for alloc defered request. (Jianhui Zhao)