improve the nocookie-udp-size documentation

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 7a74c3d868f9661bb36a8eed2ce7fad6771b1d0b..e4d61edbb91e4465173009862cc1fc8928eda122 100644 (file)
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -6519,11 +6519,11 @@ options {
              <term><command>nocookie-udp-size</command></term>
              <listitem>
                </para>
-                 The <command>nocookie-udp-size</command> option sets the
-                 maximum size of UDP responses that will be sent to
-                 queries without a valid server COOKIE.  The command
-                 <command>max-udp-size</command> option may further limit
-                 the response size.
+                 Sets the maximum size of UDP responses that will be
+                 sent to queries without a valid server COOKIE. A value
+                 below 128 will be silently raised to 128. The default
+                 value is 4096, but the <command>max-udp-size</command>
+                 option may further limit the response size.
                </para>
              </listitem>
            </varlistentry>