5910 libnisdb won't build with modern GCC

*** 18,33 ****
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
   * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * DESCRIPTION: Contains functions relating to movement of entire maps.
   */
  
  #include <unistd.h>
--- 18,32 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2015 Gary Mills
   * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
   * DESCRIPTION: Contains functions relating to movement of entire maps.
   */
  
  #include <unistd.h>
*** 42,52 ****
  
  /*
   * Switch on parts of ypdefs.h
   */
  USE_YPDBPATH
- USE_DBM
  
  /*
   * Decs
   */
  void add_separator(char *);
--- 41,50 ----