docs: mention that the echo handler is for SMB1 only

Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Karolin Seeger <kseeger@samba.org>
Autobuild-User(master): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(master): Fri Jul 13 11:44:02 CEST 2018 on sn-devel-144

diff --git a/docs-xml/smbdotconf/misc/asyncsmbechohandler.xml b/docs-xml/smbdotconf/misc/asyncsmbechohandler.xml
index 2b6eeb35d6f7d688a8bb0c54b992ed7486755eb5..26a4346c1d008ab15be448a9c4d7d1203d1803c1 100644 (file)
--- a/docs-xml/smbdotconf/misc/asyncsmbechohandler.xml
+++ b/docs-xml/smbdotconf/misc/asyncsmbechohandler.xml
@@ -7,7 +7,8 @@
          async smb echo handler. It can be beneficial if your file
          system can block syscalls for a very long time. In some
          circumstances, it prolongs the timeout that Windows uses to
-         determine whether a connection is dead.
+         determine whether a connection is dead. This parameter is only for
+         SMB1. For SMB2 and above TCP keepalives can be used instead.
        </para>
 </description>
 <value type="default">no</value>