introduce AlternativeID attribute, which needs some explanation

storage/pkg/command/gateway.go

@@ -219,9 +219,9 @@ func rules(cfg *config.Config, logger log.Logger) map[string]map[string]interfac
 	}
 
 	// generate rules based on default config
-	return map[string]map[string]interface{}{
+	ret := map[string]map[string]interface{}{
 		cfg.Reva.StorageHome.MountPath:       {"address": cfg.Reva.StorageHome.Endpoint},
-		cfg.Reva.StorageHome.MountID:         {"address": cfg.Reva.StorageHome.Endpoint},
+		cfg.Reva.StorageHome.AlternativeID:   {"address": cfg.Reva.StorageHome.Endpoint},
 		cfg.Reva.StorageUsers.MountPath:      {"address": cfg.Reva.StorageUsers.Endpoint},
 		cfg.Reva.StorageUsers.MountID + ".*": {"address": cfg.Reva.StorageUsers.Endpoint},
 		cfg.Reva.StoragePublicLink.MountPath: {"address": cfg.Reva.StoragePublicLink.Endpoint},
@@ -229,6 +229,8 @@ func rules(cfg *config.Config, logger log.Logger) map[string]map[string]interfac
 		// public link storage returns the mount id of the actual storage
 		// medatada storage not part of the global namespace
 	}
+
+	return ret
 }
 
 func mimetypes(cfg *config.Config, logger log.Logger) []map[string]interface{} {

storage/pkg/config/config.go

@@ -196,6 +196,7 @@ type StoragePort struct {
 	Driver           string `ocisConfig:"driver"`
 	MountPath        string `ocisConfig:"mount_path"`
 	MountID          string `ocisConfig:"mount_id"`
+	AlternativeID    string `ocisConfig:"alternative_id"`
 	ExposeDataServer bool   `ocisConfig:"expose_data_server"`
 	// url the data gateway will use to route requests
 	DataServerURL string `ocisConfig:"data_server_url"`
@@ -867,6 +868,7 @@ func DefaultConfig() *Config {
 				Driver:        "ocis",
 				ReadOnly:      false,
 				MountPath:     "/home",
+				AlternativeID: "1284d238-aa92-42ce-bdc4-0b0000009154",
 				MountID:       "1284d238-aa92-42ce-bdc4-0b0000009157",
 				DataServerURL: "http://localhost:9155/data",
 				HTTPPrefix:    "data",
@@ -897,6 +899,7 @@ func DefaultConfig() *Config {
 						GRPCAddr:    "127.0.0.1:9178",
 					},
 					MountPath: "/public",
+					MountID:   "e1a73ede-549b-4226-abdf-40e69ca8230d",
 				},
 				PublicShareProviderAddr: "",
 				UserProviderAddr:        "",