Ticket 48448 - dirsrv start-stop fail in certain shell environments.
    
    Bug Description:  Dirsrv fails to start and stop with certain shell environments
    . This is due to the usage of the pattern
    
      cd $SERVERBIN_DIR
      ./ns-slapd ...
    
    Fix Description:  Change all invocations of commands to use explicit paths:
    
      $SERVERBIN_DIR/ns-slapd
    
    https://fedorahosted.org/389/ticket/48448
    
    Author: wibrown
    
    Review by: nhosoi (Thanks!)