This PR was squashed before being merged into the 3.2 branch (closes#7917).Discussion----------Updated code example for LDAP integrationThe LdapClient class mentioned in the code example has been deprecated.The update example, uses the Ldap class directly, as is recommended inthe deprecation notice.Commits-------91e3e7d Updated code example for LDAP integration

* 3.2: (22 commits)  setfacl commands in the right order  [#7941] use class constant  Update guard_authentication.rst  Fix typo  Fixed code indentation  use Ldap instead of the deprecated LdapClient  Fix choice keys and values for custom field types  [#7946] fix PHP parameter config example  Tiny clarification to Finder component docs  [#7917] add LDAP extension link  Updated code example for LDAP integration  Syntax to create an email  Update usage.rst  Correct default firewall name on Security docs  Fix small typo  Change some examples to remove references to gender types  Remove remember me from interactive login examples  added missing ClassMetadata  incorrect placeholdes for leave/enter transitions  Update caution about eraseCredentials  ...

* 3.4: (27 commits)  setfacl commands in the right order  add missing options allowed with an env variable  [#7941] use class constant  Update guard_authentication.rst  Fix typo in a class name  Fix typo  Fixed trivial code example typo  Fix typo  Fix method reference (`getSubscribedServices()` instead of `getSubscribedEvents()`)  Fixed code indentation  use Ldap instead of the deprecated LdapClient  Fix choice keys and values for custom field types  [#7946] fix PHP parameter config example  Tiny clarification to Finder component docs  [#7917] add LDAP extension link  Updated code example for LDAP integration  Syntax to create an email  Update usage.rst  Correct default firewall name on Security docs  Fix small typo  ...