frpc: support metadatas and annotations in frpc proxy commands (#4623)

Release.md

@@ -1,5 +1,3 @@
 ### Features
 
-* `tzdata` is installed by default in the container image, and the time zone can be set using the `TZ` environment variable.
-* The `quic-bind-port` command line parameter is supported in frps, which specifies the port for accepting frpc connections using the QUIC protocol.
-* The vhost HTTP proxy of frps supports the h2c protocol.
+* Support metadatas and annotations in frpc proxy commands.

pkg/config/flags.go

@@ -106,6 +106,8 @@ func registerProxyBaseConfigFlags(cmd *cobra.Command, c *v1.ProxyBaseConfig, opt
 	}
 
 	cmd.Flags().StringVarP(&c.Name, "proxy_name", "n", "", "proxy name")
+	cmd.Flags().StringToStringVarP(&c.Metadatas, "metadatas", "", nil, "metadata key-value pairs (e.g., key1=value1,key2=value2)")
+	cmd.Flags().StringToStringVarP(&c.Annotations, "annotations", "", nil, "annotation key-value pairs (e.g., key1=value1,key2=value2)")
 
 	if !options.sshMode {
 		cmd.Flags().StringVarP(&c.LocalIP, "local_ip", "i", "127.0.0.1", "local ip")