[PATCH 1/3 V2] xfs_quota: document how the default quota is stored

[Eric Sandeen <sandeen@redhat.com>]

Nowhere in the xfs_quota man page is the default quota described;
what it does or where it is stored.  Add some brief information
about this.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---
 man/man8/xfs_quota.8 | 5 +++++
 1 file changed, 5 insertions(+)

V2: use "user" only in the generic sense as the rest of the overview does, and
do not refer to the "root user" specifically, rather to the root/#0 ID.

(project lists "#0" and user/group lists "root")

diff --git a/man/man8/xfs_quota.8 b/man/man8/xfs_quota.8
index dd0479cd..be04fb30 100644
--- a/man/man8/xfs_quota.8
+++ b/man/man8/xfs_quota.8
@@ -178,6 +178,11 @@ to a file on
 where the user's quota has not been exceeded.
 Then after rectifying the quota situation, the file can be moved back to the
 filesystem it belongs on.
+.SS Default Quotas
+The XFS quota subsystem allows a default quota to be enforced for any user which
+does not have a quota limit explicitly set.
+These limits are stored in and displayed as the root / ID #0 limits, although
+they do not actually limit the root user.
 .SH USER COMMANDS
 .TP
 .B print