[trac3400] ChangeLog updated.

ChangeLog

@@ -1,3 +1,10 @@
+7XX.	[func]*		tomek
+	b10-dhcp6: New parameter added to configure: --with-kea-config.
+	It allows selecting configuration backend and accepts one of two
+	values: BIND10, which uses BIND10 framework as Kea 0.8 did, or
+	JSON, which reads configuration from a JSON file.
+	(Trac #3400, git TBD)
+
 780.	[func]		marcin
 	libkea-cc: JSON parser stores information about the position
 	of the data element values in the JSON string. The position