Update auto-dnssec documentation

Explain that 'auto-dnssec' may only be activated at zone level.

(cherry picked from commit aac39647f30f39992e29e47f07ef1992db2e242e)

diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index c37d0a349ce79ea4a1434595161d2fbb45e97486..ad461647c48b8d2c938dd8b23d3cf32ba4180c1b 100644 (file)
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -2037,7 +2037,11 @@ Boolean Options
    periodically, regardless of whether ``rndc loadkeys`` is used. The
    recheck interval is defined by ``dnssec-loadkeys-interval``.
 
-   The default setting is ``auto-dnssec off``.
+   ``auto-dnssec off;`` does not allow for DNSSEC key management.
+   This is the default setting.
+
+   This option may only be activated at the zone level; if configured
+   at the view or options level, it must be set to ``off``.
 
 ``dnssec-enable``
    This option is obsolete and has no effect.