Revert "Ticket #47431 - Duplicate values for the attribute nsslapd-pluginarg are not handled correctly"
    
    This reverts commit d2c5b35e20578043117f84e928d96d296bdfc046.
    
    This commit caused a regression by introducing a hard-coded limit to
    the number of plug-in arguments for some plug-ins.  This needs to be
    solved in a different way that doesn't limit the number of arguments.