[master] added the reviewed ChangeLog entry for #2136, #2137, and #2138

When merging trac2138,
  - Git id of #2138 on the ChangeLog entry will be updated.
  - Skipped tests on tests/system/bindctl/tests.sh will be uncommented out.

ChangeLog

+468.    [func]*         naokikambe, fujiwara
+        b10-stats polls bind10 and b10-auth for statistics data.  The
+        "poll-interval" parameter in b10-stats is for configuring the polling
+        interval.  All statistics data collected once are preserved while
+        b10-stats is running.  The "sendstats" command was removed from bind10
+        and b10-auth. The "statistics-interval" configuration item was removed
+        from b10-auth.
+        (Trac #2136, git dcb5ce50b4b4e50d28247d5f8b5cb8d90bda942a)
+        (Trac #2137, git d53bb65a43f6027b15a6edc08c137951e3ce5e0e)
+        (Trac #2138, git TBD)
+
 bind10-devel-20120816 released on August 16, 2012
 
 467.	[bug]		jelte