title: Symfony3 No route found for "GET /logout"
body: <p>I cant seam to get the logout working on symfony3. I've been following the symfony documentation <a href="http://symfony.com/doc/current/reference/configuration/security.html#reference-security-firewall-form-login" rel="noreferrer">SecurityBundle Configuration</a> and as far as I can tell my config file seams to be by there specification yet when i go to <code>/logout</code> i get the following response:</p>
  
  <p><code>No route found for "GET /logout" (from "http://localhost:8000/admin")</code>. </p>
  
  <p>Any ideas on what my problem could be?</p>
  
  <p>My security.yml:</p>
  
  <pre><code>security:
  encoders:
      AppBundle\Entity\User:
          algorithm: bcrypt
      Symfony\Component\Security\Core\User\User: plaintext
  providers:
      chain_provider:
              chain:
                  providers: [in_memory, database_provider]
      in_memory:
          memory:
            users:
              test:
                  password: test
                  roles: 'ROLE_ADMIN'
              admin:
                  password: admin
                  roles: 'ROLE_ADMIN'
      database_provider:
          entity:
              class: AppBundle:User
              property: email
  firewalls:
      dev:
          pattern: ^/(_(profiler|wdt)|css|images|js)/
          security: false
      main:
          anonymous: true
          logout: true
          form_login:
              check_path: /login
              login_path: /login
              default_target_path: /login
              always_use_default_target_path: true
          logout:
              path:   /logout
              target: /login
  </code></pre>