Ticket #48191 - RFE: Adding nsslapd-maxsimplepaged-per-conn
    
    Description: Asynchronous simple paged results requests could add too much load
    the server can handle. Adding a config parameter to restrict the requests.
    
      cn=config
      nsslapd-maxsimplepaged-per-conn: INT
    
    If nsslapd-maxsimplepaged-per-conn is configured with a positive integer,
    Asynchronous simple paged results requests per connection is limitted by the
    value.  If the requests exceed the value, it returns LDAP_UNWILLING_TO_PERFORM.
    
    If the value is negative, there is no limit (default behaviour).
    If the value is 0, a simple paged results is disabled.
    
    https://fedorahosted.org/389/ticket/48191
    
    Reviewed by rmeggins@redhat.com (Thank you, Rich!)