xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
buffer.hpp	4d99525703 first commit	6 月之前
executor.hpp	4d99525703 first commit	6 月之前
internet.hpp	4d99525703 first commit	6 月之前
io_context.hpp	4d99525703 first commit	6 月之前
net.hpp	4d99525703 first commit	6 月之前
netfwd.hpp	4d99525703 first commit	6 月之前
socket.hpp	4d99525703 first commit	6 月之前
timer.hpp	4d99525703 first commit	6 月之前