title: BorisMorel / LdapBundle is calling connect even on non-restricted area
body: <p>I have integrated BorisMorel / LdapBundle version 2.0 to Symfony version 2.0.16 for <code>^/admin</code> area and it works, but there's one issue - LDAP bundle is also engaged for <code>^/api</code> which is not what I want. API should not use LDAP. I thought adding <code>IS_AUTHENTICATED_ANONYMOUSLY</code> for <code>^/api</code> as <code>access_control</code> option should help, but it doesn't - it is trying to connect.</p>
  
  <p><strong>security.yml:</strong></p>
  
  <pre><code>security:
    firewalls:
      restricted_area:
        pattern:          ^/admin
        anonymous:        ~
        provider:         ldap
        imag_ldap:        ~
        form_login:
          login_path:  /login
          check_path:  /login_check
        logout:
          path:           /logout
          target:         /login
  
    providers:
      ldap:
        id: imag_ldap.security.user.provider
  
    encoders:
      IMAG\LdapBundle\User\LdapUser: plaintext
  
    access_control:
      - { path: ^/api$,  roles: IS_AUTHENTICATED_ANONYMOUSLY }
      - { path: ^/login, roles: IS_AUTHENTICATED_ANONYMOUSLY }
      # - { path: ^/,      roles: IS_AUTHENTICATED_FULLY }
  
    factories:
      - "%kernel.root_dir%/../src/IMAG/LdapBundle/Resources/config/security_factories.xml"
  
  imag_ldap:
    client:
      host: foo.bar.com
      port: 389
      referrals_enabled: 0
      version: 3
  
    user:
      base_dn: ou=user,dc=bar,dc=com
      name_attribute: uid
  
    role:
      base_dn: ou=user,dc=bar,dc=com
      name_attribute: cn
      user_attribute: member
  </code></pre>
  
  <p><strong>Question:</strong> How can I 'turn off' LDAP for <code>^/api</code> at all?</p>