add center info at fixed address in shm.

lichao

2021-05-14 9bf199a4770b08c03d553129757d960b605e598a

 .gitignore

@@ -9,4 +9,5 @@
*/bhshmq_center
*/help
*/bhshmqbox
*/bhshmq_status
*/bhshmq_status
.idea