feat: allow config service only on client

[yorktown-class]

Related to #161

允许server直接使用client对service的配置

在server启用

[server]
accept_client_recommend_service = true

[server.services] #这个东西现在还是必须要有

在client配置

[client.services.echo] 
local_addr = "127.0.0.1:8080" 
recommend_blind_addr = "0.0.0.0:2334"

[rapiz1]

Is it sending the configuration in plain text? That's something unfavored

[yorktown-class]

I'm sending the configuration in plain text. Won't it be encrypted, even if 'transport.tls' is configured?

[ZHLHZHU]

any progress on this?