EMQ X Core

Bug fixes:

• Fix emqx/emqx: issue #2595

  Github PR: emqx/emqx#2601

• Fix the issue that failed when setting the log level

  Github PR: emqx/emqx#2600

• Fix the issue that doesn't match the return value

  Github PR: emqx/emqx#2560

• Hotfix for emqx_sn and emqx_coap plugins

  Github PR: emqx/emqx#2556

emqx-coap (plugin)

Bug fixes:

• Fix the issue that messages can't be published

  Github PR: emqx/emqx-coap#120

ekka (deps)

Bug fixes:

• Fix the issue makes emqx_sm_locker crash

  Github PR: emqx/ekka#54

• Fix the issue that k8s can't use dns cluster

  Github PR: emqx/ekka#53

• Fix the issue that etcd cluster is unusable

  Github PR: emqx/ekka#52