Add trailing folder seperator to allow symlinks as folder path (fixes #1361)

lib/config/config.go

@@ -363,6 +363,9 @@ func (cfg *Configuration) prepare(myID protocol.DeviceID) {
 		// This way in the tests, we get away without OS specific separators
 		// in the test configs.
 		folder.RawPath = filepath.Dir(folder.RawPath + string(filepath.Separator))
+		if folder.RawPath[len(folder.RawPath)-1] != filepath.Separator {
+			folder.RawPath = folder.RawPath + string(filepath.Separator)
+		}
 
 		if folder.ID == "" {
 			folder.ID = "default"

lib/config/config_test.go

@@ -91,7 +91,7 @@ func TestDeviceConfig(t *testing.T) {
 		expectedFolders := []FolderConfiguration{
 			{
 				ID:              "test",
-				RawPath:         "testdata",
+				RawPath:         "testdata" + string(filepath.Separator),
 				Devices:         []FolderDeviceConfiguration{{DeviceID: device1}, {DeviceID: device4}},
 				ReadOnly:        true,
 				RescanIntervalS: 600,
@@ -326,7 +326,7 @@ func TestIssue1262(t *testing.T) {
 	}
 
 	actual := cfg.Folders()["test"].RawPath
-	expected := "e:"
+	expected := "e:/"
 	if runtime.GOOS == "windows" {
 		expected = `e:\`
 	}