CHANGES note, update README.md an manpage.

CHANGES

@@ -1,3 +1,8 @@
+5355.	[func]		What was set with --with-tuning=large option in
+			older BIND9 versions is now a default, and
+			a --with-tuning=small option was added for small
+			(e.g. OpenWRT) systems. [GL !2989]
+
 5354.	[bug]		dnssec-policy created new KSK keys when zone is in
 			initial stage of signing (the DS is not yet in
 			rumoured or omnipresent state).  Fix by checking

README.md

@@ -242,11 +242,9 @@ and `libprotobuf-c`
 and BIND must be configured with `--enable-dnstap`.
 
 Certain compiled-in constants and default settings can be increased to
-values better suited to large servers with abundant memory resources (e.g,
-64-bit servers with 12G or more of memory) by specifying
-`--with-tuning=large` on the `configure` command line. This can improve
-performance on big servers, but will consume more memory and may degrade
-performance on smaller systems.
+values better suited to small machines, e.g. OpenWRT boxes, by specifying
+`--with-tuning=small` on the `configure` command line. This will decrease
+memory usage by using smaller structures, but will degrade performance.
 
 On Linux, process capabilities are managed in user space using
 the `libcap` library, which can be installed on most Linux systems via

bin/named/named.docbook

@@ -294,9 +294,9 @@
           <para>
             Allow <command>named</command> to use up to
             <replaceable class="parameter">#max-socks</replaceable> sockets.
-            The default value is 4096 on systems built with default
-            configuration options, and 21000 on systems built with
-            "configure --with-tuning=large".
+            The default value is 21000 on systems built with default
+            configuration options, and 4096 on systems built with
+            "configure --with-tuning=small".
           </para>
           <warning>
             <para>