Update esockd deps and fix compile warning

rebar.config

@@ -5,7 +5,7 @@
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.3.1"}}}
     , {ekka, {git, "https://github.com/emqx/ekka", {tag, "v0.5.5"}}}
     , {replayq, {git, "https://github.com/emqx/replayq", {tag, "v0.1.1"}}}
-    , {esockd, {git, "https://github.com/emqx/esockd", {tag, "v5.4.4"}}}
+    , {esockd, "5.5.0"}
     , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v3.0.0"}}}
     ]}.
 

src/emqx_protocol.erl

@@ -1016,7 +1016,7 @@ do_check_banned(_EnableBan = true, Credentials) ->
         true  -> {error, ?RC_BANNED};
         false -> ok
     end;
-do_check_banned(_EnableBan, Credentials) -> ok.
+do_check_banned(_EnableBan, _Credentials) -> ok.
 
 do_acl_check(_EnableAcl = true, Action, Credentials, Topic) ->
     AllowTerm = ok,