extending feature flag false by default to the engine

Core/Features/Manager.php

@@ -45,9 +45,9 @@ class Manager
  $features = $this->config->get('features') ?: [];
 
  if (!isset($features[$feature])) {
- error_log("[Features\Manager] Feature '{$feature}' is not declared. Assuming true.");
+ error_log("[Features\Manager] Feature '{$feature}' is not declared. Assuming false.");
 
- return true;
+ return false;
  }
 
  if ($features[$feature] === 'admin' && $this->user->isAdmin()) {

Spec/Core/Features/ManagerSpec.php

@@ -24,13 +24,13 @@ class ManagerSpec extends ObjectBehavior
  $this->shouldHaveType(Manager::class);
  }
 
- function it_should_check_if_a_feature_exists_unsuccessfully_and_assume_its_active()
+ function it_should_check_if_a_feature_exists_unsuccessfully_and_assume_its_inactive()
  {
  $this->config->get('features')
  ->shouldBeCalled()
  ->willReturn(['plus' => true, 'wire' => false]);
 
- $this->has('boost')->shouldReturn(true);
+ $this->has('boost')->shouldReturn(false);
  }
 
  function it_should_check_if_a_feature_exists_and_return_its_deactivated()