[#3576] Updated ARM, added ChangeLog

modified:
    ChangeLog
    doc/sphinx/arm/classify.rst

Author: tmarkwalder

ChangeLog

@@ -1,3 +1,12 @@
+2283.   [func]      tmark
+	The order or precedence of options specified in a
+	template class and its spawned classes has been
+	reversed.  An option specified in a spawned class now
+	takes precedence over the same option if specified in
+	the template class. This change applies to both
+	kea-dhcp4 and kea-dhcp6.
+	(Gitlab #3576)
+
 2282.	[bug]		razvan
 	Fixed a bug caused by starting listeners when checking the
 	configuration using the '-T' command line parameter. This was

doc/sphinx/arm/classify.rst

@@ -730,7 +730,8 @@ A client class definition can contain the following properties:
    The resulting spawned class has the following generated name format:
    ``SPAWN_<template-class-name>_<evaluated-value>``.
    After classes are evaluated and a spawned class is generated, the corresponding
-   template class name is also associated with the packet.
+   template class name is also associated with the packet. An Option specified in a
+   spawned class will take precedence over the same option if set in its template class.
  - The ``option-data`` list is not mandatory and contains options that should be
    assigned to members of this class. In the case of a template class, these
    options are assigned to the generated spawned class.