4391 panic system rather than corrupting pool if we hit bug 4390
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Gordon Ross <gwr@nexenta.com>

*** 18,28 ****
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_ZFS_DEBUG_H
  #define _SYS_ZFS_DEBUG_H
  
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_ZFS_DEBUG_H
  #define _SYS_ZFS_DEBUG_H
  
*** 57,67 ****
  #define ZFS_DEBUG_MODIFY                (1 << 4)
  #define ZFS_DEBUG_SPA                   (1 << 5)
  #define ZFS_DEBUG_ZIO_FREE              (1 << 6)
  #define ZFS_DEBUG_HISTOGRAM_VERIFY      (1 << 7)
  #define ZFS_DEBUG_METASLAB_VERIFY       (1 << 8)
- #define ZFS_DEBUG_INDIRECT_REMAP        (1 << 9)
  
  #ifdef ZFS_DEBUG
  extern void __dprintf(const char *file, const char *func,
      int line, const char *fmt, ...);
  #define dprintf(...) \
--- 57,66 ----