Update `also-notify` docs for non-standard ports

This patch documents sending NOTIFY on non-standard ports for `also-notify`.

diff --git a/docs/settings.rst b/docs/settings.rst
index f3cf30f0742c15a5117241dfae169e8c2659e1c5..ef7860c9f59a01c8d6c0203df6e12aa6cbc3eedd 100644 (file)
--- a/docs/settings.rst
+++ b/docs/settings.rst
@@ -106,6 +106,10 @@ When notifying a zone, also notify these nameservers. Example:
 ``also-notify`` always receive a notification. Even if they do not match
 the list in :ref:`setting-only-notify`.
 
+You may specify an alternate port by appending :port. Example:
+``also-notify=192.0.2.1:5300``. If no port is specified, port 53
+is used.
+
 .. _setting-any-to-tcp:
 
 ``any-to-tcp``