[2796] revise a note for qryrecursion

diff --git a/src/bin/auth/b10-auth.xml.pre b/src/bin/auth/b10-auth.xml.pre
index 02850690bd716181f442f92fc3a3283127ab8c75..2bf20c8310483a1eaffecdf8fd54c4eb111b9757 100644 (file)
--- a/src/bin/auth/b10-auth.xml.pre
+++ b/src/bin/auth/b10-auth.xml.pre
@@ -250,10 +250,15 @@
       </para>
 
       <para>
-        RD bit is not specific to queries (requests of opcode 0), but
-       <quote>qryrecursion</quote> is limited to queries because RD bit is
-       meaningless for the other opcodes and they are passed to another
-       BIND 10 module such as <command>b10-ddns</command>.
+       The <quote>qryrecursion</quote> counter is limited to queries
+       (requests of opcode 0) even though the RD bit is not specific
+       to queries.  In practice, this bit is generally just ignored for
+       other types of requests, while DNS servers behave differently
+       for queries depending on this bit.  It is also known that
+       some authoritative-only servers receive a non negligible
+       number of queries with the RD bit being set, so it would be
+       of particular interest to have a specific counters for such
+       requests.
       </para>
     </note>