Add a note on DNSSEC sign metrics in the ARM

This was added previously in commit
3a3f40e3729e1e3ab32f6c18eeecfd4749812ffb but was lost when the
documentation was converted to RST files.

diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index 1b357120ebc6622a1d2b07795344f87bef4bc340..fd76854f06e1fc73a23a49d9720f0798d44d10f1 100644 (file)
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -1533,8 +1533,10 @@ default is used.
    If ``full``, the server collects statistical data on all zones,
    unless specifically turned off on a per-zone basis by specifying
    ``zone-statistics terse`` or ``zone-statistics none`` in the ``zone``
-   statement. The default is ``terse``, providing minimal statistics on
-   zones (including name and current serial number, but not query type
+   statement. These include, for example, DNSSEC signing operations
+   and the number of authoritative answers per query type.  The
+   default is ``terse``, providing minimal statistics on zones
+   (including name and current serial number, but not query type
    counters).
 
    These statistics may be accessed via the ``statistics-channel`` or