NewAuthorizer constructs an Authorizer based on the PermissionsSpec stored in the context for the specified 'name' (which defaults to "runtime" for an empty string value).

NewAuthorizerOrDie returns an authorizer configured in the same way as that for 'runtime', preferring a literal (ie.

PermissionsFromSpec returns the permissions specified by the supplied PermissionsSpec for 'runtime' (ie.