Netty4

Config netty4 support in dubbo

Add support for netty4 communication module in 2.5.6 version of dubbo, enabled as follows:

provider:

<dubbo:protocol server="netty4" />

or

<dubbo:provider server="netty4" />

consumer:

<dubbo:consumer client="netty4" />

Last modified December 5, 2022: Update pb-generic-reference.md (34ccd8b)