wangxiyuan 210976fbae Update message api-ref
The message get_all and delete_all api-ref is a litte misleading.
Update it to be more clear.

Change-Id: I7e94bc89bc41ad85199f5664ee92ce001a4835fe
2017-10-16 14:35:13 +08:00
..
2017-10-16 14:35:13 +08:00