OS-1566 dataset quota for ZFS datasets

*** 1,7 ****
--- 1,8 ----
  '\" te
  .\" Copyright (c) 2012 by Delphix. All rights reserved.
+ .\" Copyright (c) 2012 Joyent, Inc. All rights reserved.
  .\" The contents of this file are subject to the terms of the Common Development
  .\" and Distribution License (the "License").  You may not use this file except
  .\" in compliance with the License. You can obtain a copy of the license at
  .\" usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
  .\"
*** 10,20 ****
  .\" CDDL HEADER in each file and include the License file at
  .\" usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this
  .\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
  .\" own identifying information:
  .\" Portions Copyright [yyyy] [name of copyright owner]
! .TH ZPOOL-FEATURES 5 "Mar 16, 2012"
  .SH NAME
  zpool\-features \- ZFS pool feature descriptions
  .SH DESCRIPTION
  .sp
  .LP
--- 11,21 ----
  .\" CDDL HEADER in each file and include the License file at
  .\" usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this
  .\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
  .\" own identifying information:
  .\" Portions Copyright [yyyy] [name of copyright owner]
! .TH ZPOOL-FEATURES 5 "Oct 24, 2012"
  .SH NAME
  zpool\-features \- ZFS pool feature descriptions
  .SH DESCRIPTION
  .sp
  .LP
*** 168,177 ****
--- 169,199 ----
  through the \fBfreeing\fR property.
  
  This feature is only \fBactive\fR while \fBfreeing\fR is non\-zero.
  .RE
  
+ .sp
+ .ne 2
+ .na
+ \fB\fBdataset_quota\fR\fR
+ .ad
+ .RS 4n
+ .TS
+ l l .
+ GUID    com.joyent:dataset_quota
+ READ\-ONLY COMPATIBLE   yes
+ DEPENDENCIES    none
+ .TE
+ 
+ This feature enables dataset quotas and snapshot quotas. These quotas
+ can be used to limit how many datasets and/or snapshots can be created
+ under the dataset on which the quotas are set.
+ 
+ This feature is \fBactive\fR once either of the quota properties has been
+ set on a dataset.
+ .RE
+ 
  .sp
  .ne 2
  .na
  \fB\fBempty_bpobj\fR\fR
  .ad