sendq use less shm, copy data.

lichao

2021-04-16 708ff9e8af731e2799767ed8bfca7df3b74fc26a

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*.un~
build/
debug/
release/
Makefile
utest/utest
*.bak
gmon.out
*/bhshmq_center
*/help
*/bhshmqbox
*/bhshmq_status