[2252] update descriptions of latest_ixfr_duration and latest_axfr_duration about their default values

src/bin/xfrin/b10-xfrin.xml

@@ -297,14 +297,14 @@ operation
                   <varlistentry>
                     <term>latest_ixfr_duration</term>
                     <listitem><simpara>
-                      Duration of the latest IXFR
+                      Duration of the latest IXFR. 0.0 means no successful IXFR done.
                     </simpara></listitem>
                   </varlistentry>
 
                   <varlistentry>
                     <term>latest_axfr_duration</term>
                     <listitem><simpara>
-                      Duration of the latest AXFR
+                      Duration of the latest AXFR. 0.0 means no successful AXFR done.
                     </simpara></listitem>
                   </varlistentry>
 

src/bin/xfrin/xfrin.spec

@@ -194,7 +194,7 @@
               "item_optional": false,
               "item_default": 0.0,
               "item_title": "Latest IXFR duration",
-              "item_description": "Duration of the latest IXFR"
+              "item_description": "Duration of the latest IXFR. 0.0 means no successful IXFR done."
             },
             {
               "item_name": "latest_axfr_duration",
@@ -202,7 +202,7 @@
               "item_optional": false,
               "item_default": 0.0,
               "item_title": "Latest AXFR duration",
-              "item_description": "Duration of the latest AXFR"
+              "item_description": "Duration of the latest AXFR. 0.0 means no successful AXFR done."
             }
           ]
         }

src/lib/python/isc/statistics/tests/testdata/test_spec3.spec

@@ -103,7 +103,7 @@
               "item_optional": false,
               "item_default": 0.0,
               "item_title": "Latest IXFR duration",
-              "item_description": "Duration of the latest IXFR"
+              "item_description": "Duration of the latest IXFR. 0.0 means no successful IXFR done."
             },
             {
               "item_name": "latest_axfr_duration",
@@ -111,7 +111,7 @@
               "item_optional": false,
               "item_default": 0.0,
               "item_title": "Latest AXFR duration",
-              "item_description": "Duration of the latest AXFR"
+              "item_description": "Duration of the latest AXFR. 0.0 means no successful AXFR done."
             }
           ]
         }