add comment about +trace and @server

(cherry picked from commit 2561b2dd842a25ef3a7fa9a1868ec87fee3da427)

diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
index 52b051959203842f3e3e1d89a58d0b87c4bdc8c5..8a3022dfc893d4b85ca39b875fb7082c8a022bc9 100644 (file)
--- a/bin/dig/dig.docbook
+++ b/bin/dig/dig.docbook
@@ -939,6 +939,9 @@
              resolve the name being looked up.  It will follow
              referrals from the root servers, showing the answer
              from each server that was used to resolve the lookup.
+           </para> <para>
+             If @server is also specified, it affects only the
+             initial query for the root zone name servers.
            </para> <para>
              <command>+dnssec</command> is also set when +trace
              is set to better emulate the default queries from a