nss_schema in nslcd.conf

[Martin Gröger <mgroeger1 [at] web.de>]

    Hello,
    
    I'd like to use the configuration option
    nss_schema <rfc2307bis|rfc2307>
    to enable rfc2307bis.
    
    But when I start nslcd with 'nslcd -d' I get the error message:
    nslcd: /etc/nslcd.conf:89: unknown keyword: 'nss_schema'
    
    I'm using 
      CentOS Linux release 7.8.2003 (Core)
      with
    nss-pam-ldapd-0.8.13-22.el7_8.1.x86_64
      
      So what am I doing wrong?
      
      Kind regrads,
      Martin