batman-adv: ABI: Mark sysfs files as deprecated

The sysfs files are replaced by the batadv generic netlink family. The old
sysfs configuration interface was frowned upon by other kernel developers.
But the files cannot be removed immediately because userspace tools might
still depend on it. Instead schedule for its removal in 2021.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

Documentation/ABI/obsolete/sysfs-class-net-batman-adv

@@ -1,3 +1,5 @@
+This ABI is deprecated and will be removed after 2021. It is
+replaced with the batadv generic netlink family.
 
 What:           /sys/class/net/<iface>/batman-adv/elp_interval
 Date:           Feb 2014

Documentation/ABI/obsolete/sysfs-class-net-mesh

@@ -1,3 +1,5 @@
+This ABI is deprecated and will be removed after 2021. It is
+replaced with the batadv generic netlink family.
 
 What:           /sys/class/net/<mesh_iface>/mesh/aggregated_ogms
 Date:           May 2010

MAINTAINERS

@@ -2795,8 +2795,8 @@ L:	b.a.t.m.a.n@lists.open-mesh.org (moderated for non-subscribers)
 W:	https://www.open-mesh.org/
 Q:	https://patchwork.open-mesh.org/project/batman/list/
 S:	Maintained
-F:	Documentation/ABI/testing/sysfs-class-net-batman-adv
-F:	Documentation/ABI/testing/sysfs-class-net-mesh
+F:	Documentation/ABI/obsolete/sysfs-class-net-batman-adv
+F:	Documentation/ABI/obsolete/sysfs-class-net-mesh
 F:	Documentation/networking/batman-adv.rst
 F:	include/uapi/linux/batadv_packet.h
 F:	include/uapi/linux/batman_adv.h