BIG change, join center,bus; now msg is head+body.

lichao

2021-04-08 c338820e4db43ad32c20ff429a038b06bcb980f8

 .gitignore

@@ -1,4 +1,8 @@
*.un~
build/
debug/
release/
Makefile
utest/utest
*.bak
gmon.out