Authenticate a user against an LDAP directory Useful for Windows Active Directory and other LDAP-based organisations to maintain a single password across the organisation. Optionally authenticates only if a member of a given group in the directory. The person must have registered with Friendika using the normal registration procedures in order to have a Friendika user record, contact, and profile. Note when using with Windows Active Directory: you may need to set TLS_CACERT in your site ldap.conf file to the signing cert for your LDAP server. The required configuration options for this module may be set in the .htconfig.php file e.g.: $a->config['ldapauth']['ldap_server'] = 'host.example.com'; ...etc.