543. [func] Add statistics option, enable statistics-file option,

                        add RNDC option "dump-statistics" to write out a
                        query statistics file.

CHANGES

+ 544.	[func]		Add statistics option, enable statistics-file option,
+			add RNDC option "dump-statistics" to write out a
+			query statistics file.
+
  543.	[doc]		The 'port' option is now documented.
 
  542.	[func]		Add allow-update-forwarding support.