[519] update stats documents

src/bin/stats/b10-stats.8

@@ -45,7 +45,7 @@ with other modules like
 \fBb10\-auth\fR
 and so on\&. It waits for coming data from other modules, then other modules send data to stats module periodically\&. Other modules send stats data to stats module independently from implementation of stats module, so the frequency of sending data may not be constant\&. Stats module collects data and aggregates it\&.
 \fBb10\-stats\fR
-invokes "sendstats" command for
+invokes an internal command for
 \fBbind10\fR
 after its initial starting because it\*(Aqs sure to collect statistics data from
 \fBbind10\fR\&.

src/bin/stats/b10-stats.xml

@@ -64,7 +64,7 @@
       send stats data to stats module independently from
       implementation of stats module, so the frequency of sending data
       may not be constant. Stats module collects data and aggregates
-      it. <command>b10-stats</command> invokes "sendstats" command
+      it. <command>b10-stats</command> invokes an internal command
       for <command>bind10</command> after its initial starting because it's
       sure to collect statistics data from <command>bind10</command>.
     </para>