node remove mq if never registered; refactor.

lichao

2021-04-16 c6964d5af25d4ec7ed9dbe7674dc4e3896b36ead

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