fix(milter): remove erroneous path check

A remnant of d0e7df023c when milter.NewClient() didn't accept path.

Signed-off-by: Martin Matous <m@matous.dev>

internal/check/milter/milter.go

@@ -90,9 +90,6 @@ func (c *Check) Init(cfg *config.Map) error {
 	default:
 		return fmt.Errorf("%s: scheme unsupported: %v", modName, endp.Scheme)
 	}
-	if endp.Path != "" {
-		return fmt.Errorf("%s: stray path in endpoint: %v", modName, endp)
-	}
 
 	c.cl = milter.NewClientWithOptions(endp.Network(), endp.Address(), milter.ClientOptions{
 		Dialer: &net.Dialer{

internal/check/milter/milter_test.go

@@ -0,0 +1,61 @@
+/*
+Maddy Mail Server - Composable all-in-one email server.
+Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package milter
+
+import (
+	"testing"
+
+	"github.com/foxcpp/maddy/framework/config"
+)
+
+func TestAcceptValidEndpoints(t *testing.T) {
+	for _, endpoint := range []string{
+		"tcp://0.0.0.0:10025",
+		"tcp://[::]:10025",
+		"tcp:127.0.0.1:10025",
+		"unix://path",
+		"unix:path",
+		"unix:/path",
+		"unix:///path",
+		"unix://also/path",
+		"unix:///also/path",
+	} {
+		c := &Check{milterUrl: endpoint}
+
+		err := c.Init(&config.Map{})
+		if err != nil {
+			t.Errorf("Unexpected failure for %s: %v", endpoint, err)
+			return
+		}
+	}
+}
+
+func TestRejectInvalidEndpoints(t *testing.T) {
+	for _, endpoint := range []string{
+		"tls://0.0.0.0:10025",
+		"tls:0.0.0.0:10025",
+	} {
+		c := &Check{milterUrl: endpoint}
+		err := c.Init(&config.Map{})
+		if err == nil {
+			t.Errorf("Accepted invalid endpoint: %s", endpoint)
+			return
+		}
+	}
+}