Remove 'OCM_OCM_PROVIDER_AUTHORIZER_VERIFY_REQUEST_HOSTNAME' setting

The feature never really worked correctly and it's added value is at least
arguable.

Fixes #10355

changelog/unreleased/fix-remove-non-working-ocm-setting.md

@@ -0,0 +1,12 @@
+Bugfix: Removed 'OCM_OCM_PROVIDER_AUTHORIZER_VERIFY_REQUEST_HOSTNAME' setting
+
+The config option 'OCM_OCM_PROVIDER_AUTHORIZER_VERIFY_REQUEST_HOSTNAME' was
+removed from the OCM service. The additional security provided by this setting
+is somewhat questionable and only provided in very specific setups.
+
+We are not going through the normal deprecation process for this setting, as it
+was never really working anyway. If you have this setting in your configuration,
+it will be ignored. You can safely remove it.
+
+https://github.com/owncloud/ocis/pull/104xx
+https://github.com/owncloud/ocis/issues/10355

services/ocm/pkg/config/config.go

@@ -114,8 +114,7 @@ type OCMProviderAuthorizerDrivers struct {
 }
 
 type OCMProviderAuthorizerJSONDriver struct {
-	Providers             string `yaml:"providers" env:"OCM_OCM_PROVIDER_AUTHORIZER_PROVIDERS_FILE" desc:"Path to the JSON file where ocm invite data will be stored. Defaults to $OCIS_CONFIG_DIR/ocmproviders.json." introductionVersion:"5.0"`
-	VerifyRequestHostname bool   `yaml:"verify_request_hostname" env:"OCM_OCM_PROVIDER_AUTHORIZER_VERIFY_REQUEST_HOSTNAME" desc:"Verify the hostname of the incoming request against the hostname of the OCM provider." introductionVersion:"5.0"`
+	Providers string `yaml:"providers" env:"OCM_OCM_PROVIDER_AUTHORIZER_PROVIDERS_FILE" desc:"Path to the JSON file where ocm invite data will be stored. Defaults to $OCIS_CONFIG_DIR/ocmproviders.json." introductionVersion:"5.0"`
 }
 
 type OCMCore struct {

services/ocm/pkg/revaconfig/config.go

@@ -130,8 +130,7 @@ func OCMConfigFromStruct(cfg *config.Config, logger log.Logger) map[string]inter
 					"driver": cfg.OCMProviderAuthorizerDriver,
 					"drivers": map[string]interface{}{
 						"json": map[string]interface{}{
-							"providers":               cfg.OCMProviderAuthorizerDrivers.JSON.Providers,
-							"verify_request_hostname": cfg.OCMProviderAuthorizerDrivers.JSON.VerifyRequestHostname,
+							"providers": cfg.OCMProviderAuthorizerDrivers.JSON.Providers,
 						},
 					},
 				},