recursor: Update server-id docs

diff --git a/pdns/recursordist/docs/settings.rst b/pdns/recursordist/docs/settings.rst
index 1cb7802a86367fc9b936d265e4f4101c63adfdad..d9c4261d46fce94be2bab5d81c54d1b8a75b7482 100644 (file)
--- a/pdns/recursordist/docs/settings.rst
+++ b/pdns/recursordist/docs/settings.rst
@@ -967,14 +967,18 @@ Throttle a server that has failed to respond `server-down-max-fails`_ times for
 -  String
 -  Default: The hostname of the server
 
-The PowerDNS recursor by replies to a query for 'id.server' with its hostname, useful for in clusters.
-Use this setting to override the answer it gives.
+The reply given by The PowerDNS recursor to a query for 'id.server' with its hostname, useful for in clusters.
+When a query contains the :rfc:`NSID EDNS0 Option <5001>`__, this value is returned in the response as the NSID value.
+
+This setting can be used to override the answer given to these queries.
+Set to "disabled" to disable NSID and 'id.server' answers.
 
 Query example (where 192.0.2.14 is your server):
 
 .. code-block:: sh
 
     dig @192.0.2.14 CHAOS TXT id.server.
+    dig @192.0.2.14 example.com IN A +nsid
 
 ``setgid``, ``setuid``
 ----------------------