9521 Add checkpoint field in the default list of the zpool-list man page

Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: kpande <github@tripleback.net>
Approved by: Dan McDonald <danmcd@joyent.com>

usr/src/man/man1m/zpool.1m

@@ -25,7 +25,7 @@
 .\" Copyright (c) 2017 Datto Inc.
 .\" Copyright (c) 2017 George Melikov. All Rights Reserved.
 .\"
-.Dd December 6, 2017
+.Dd April 27, 2018
 .Dt ZPOOL 1M
 .Os
 .Sh NAME
@@ -1449,7 +1449,7 @@ See the
 .Sx Properties
 section for a list of valid properties.
 The default list is
-.Cm name , size , allocated , free , expandsize , fragmentation , capacity ,
+.Cm name , size , allocated , free , checkpoint, expandsize , fragmentation , capacity ,
 .Cm dedupratio , health , altroot .
 .It Fl p
 Display numbers in parsable