10592 misc. metaslab and vdev related ZoL bug fixes
Portions contributed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Giuseppe Di Natale <guss80@gmail.com>
Reviewed by: George Melikov <mail@gmelikov.ru>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Tony Hutter <hutter2@llnl.gov>
Reviewed by: Kody Kantor <kody.kantor@joyent.com>
Approved by: Dan McDonald <danmcd@joyent.com>

*** 8,18 ****
  .\" source.  A copy of the CDDL is also available via the Internet at
  .\" http://www.illumos.org/license/CDDL.
  .\"
  .\"
  .\" Copyright 2012, Richard Lowe.
! .\" Copyright (c) 2012, 2017 by Delphix. All rights reserved.
  .\" Copyright 2017 Nexenta Systems, Inc.
  .\"
  .Dd April 14, 2017
  .Dt ZDB 1M
  .Os
--- 8,18 ----
  .\" source.  A copy of the CDDL is also available via the Internet at
  .\" http://www.illumos.org/license/CDDL.
  .\"
  .\"
  .\" Copyright 2012, Richard Lowe.
! .\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
  .\" Copyright 2017 Nexenta Systems, Inc.
  .\"
  .Dd April 14, 2017
  .Dt ZDB 1M
  .Os
*** 185,195 ****
  .Pp
  If the
  .Fl u
  option is also specified, also display the uberblocks on this device.
  .It Fl L
! Disable leak tracing and the loading of space maps.
  By default,
  .Nm
  verifies that all non-free blocks are referenced, which can be very expensive.
  .It Fl m
  Display the offset, spacemap, and free space of each metaslab.
--- 185,195 ----
  .Pp
  If the
  .Fl u
  option is also specified, also display the uberblocks on this device.
  .It Fl L
! Disable leak detection and the loading of space maps.
  By default,
  .Nm
  verifies that all non-free blocks are referenced, which can be very expensive.
  .It Fl m
  Display the offset, spacemap, and free space of each metaslab.