auth/ldap: Also fix-up LDAP

Author: foxcpp

cmd/maddy/maddy.conf

@@ -0,0 +1,13 @@
+
+state_dir /tmp
+runtime_dir /tmp
+
+smtp tcp://127.0.0.1:1234 {
+	tls off
+	auth ldap {
+		base_dn "1"
+		filter "2 "
+	}
+	hostname test
+	deliver_to dummy
+}

internal/auth/ldap/ldap.go

@@ -54,7 +54,7 @@ func (a *Auth) Configure(inlineArgs []string, cfg *config.Map) error {
 
 	cfg.Bool("debug", true, false, &a.log.Debug)
 	cfg.Custom("tls_client", true, false, func() (interface{}, error) {
-		return tls.Config{}, nil
+		return &tls.Config{}, nil
 	}, tls2.TLSClientBlock, &a.tlsCfg)
 	cfg.Callback("urls", func(m *config.Map, node config.Node) error {
 		a.urls = append(a.urls, node.Args...)