add api; fix send, socknode mem leak.

lichao

2021-04-15 c64c54d8e75b9354dc49a7b6b2d326e7dd59eb37

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