qemu-doc: Belatedly document QMP command deprecation

Commit 24fb413300 "qmp: Introduce blockdev-change-medium" (v2.5.0)
deprecated change.

Commit 2ff3025797 "migrate: move max-bandwidth and downtime-limit to
migrate_set_parameter" (v2.8.0) deprecated migrate_set_downtime and
migrate_set_speed.

These wre missed in commit eb22aeca65 "docs: document deprecation
policy & deprecated features in appendix" (v2.10.0).

Commit 73af8dd8d7 "migration: Make xbzrle_cache_size a migration
parameter" (v2.11.0) deprecated migrate-set-cache-size and
query-migrate-cache-size, but neglected to update qemu-doc.

Make up for that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20191024110237.30963-6-armbru@redhat.com>
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index 7239e09..f727bd3 100644
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -149,6 +149,18 @@
 
 @section QEMU Machine Protocol (QMP) commands
 
+@subsection change (since 2.5.0)
+
+Use ``blockdev-change-medium'' or ``change-vnc-password'' instead.
+
+@subsection migrate_set_downtime and migrate_set_speed (since 2.8.0)
+
+Use ``migrate-set-parameters'' instead.
+
+@subsection migrate-set-cache-size and query-migrate-cache-size (since 2.11.0)
+
+Use ``migrate-set-parameters'' and ``query-migrate-parameters'' instead.
+
 @subsection query-block result field dirty-bitmaps[i].status (since 4.0)
 
 The ``status'' field of the ``BlockDirtyInfo'' structure, returned by