[master] updated change entry for #2169, clarifying the workable versions.

also changed the category from bug to build (it was definitely not a bug).
okayed on jabber.

ChangeLog

@@ -1,6 +1,8 @@
-456.	[bug]		muks
+456.	[build]*	muks
 	BIND 10 now compiles against log4cplus-1.1.0 (RC releases)
-	also. Thanks to John Lumby for sending a patch.
+	also.  Note: some older versions of log4cplus don't work any more;
+	known oldest workable version is 1.0.4.  Thanks to John Lumby for
+	sending a patch.
 	(Trac #2169, git 7d7e5269d57451191c0aef1b127d292d3615fe2c)
 
 455.	[func]*		vorner