refactor: rename rpc.tcp_client_num to rpc.client_num

tcp_client_num is kept as an alias

apps/emqx/src/emqx_rpc.erl

@@ -137,7 +137,7 @@ maybe_badrpc(Delivery) ->
     Delivery.
 
 max_client_num() ->
-    emqx:get_config([rpc, tcp_client_num], ?DefaultClientNum).
+    emqx:get_config([rpc, client_num], ?DefaultClientNum).
 
 -spec unwrap_erpc(emqx_rpc:erpc(A) | [emqx_rpc:erpc(A)]) -> A | {error, _Err} | list().
 unwrap_erpc(Res) when is_list(Res) ->

apps/emqx_conf/src/emqx_conf_schema.erl

@@ -774,12 +774,13 @@ fields("rpc") ->
                     desc => ?DESC(rpc_ssl_server_port)
                 }
             )},
-        {"tcp_client_num",
+        {"client_num",
             sc(
                 range(1, 256),
                 #{
+                    aliases => [tcp_client_num]
                     default => 10,
-                    desc => ?DESC(rpc_tcp_client_num)
+                    desc => ?DESC(rpc_client_num)
                 }
             )},
         {"connect_timeout",

rel/i18n/emqx_conf_schema.hocon

@@ -383,10 +383,10 @@ log_burst_limit_max_count.desc:
 log_burst_limit_max_count.label:
 """Events Number"""
 
-rpc_tcp_client_num.desc:
+rpc_client_num.desc:
 """Set the maximum number of RPC communication channels initiated by this node to each remote node."""
 
-rpc_tcp_client_num.label:
+rpc_client_num.label:
 """RPC TCP Client Num"""
 
 cluster_k8s_address_type.desc: