RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 34f3f2538b5abbc85e72bde635bae21132562be2

kopia lustrzana https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

bernard.xiong 2de41d04ad add upd and tcp echo server.		16 lat temu
..
tcpecho.c	2de41d04ad add upd and tcp echo server.	16 lat temu
udpecho.c	2de41d04ad add upd and tcp echo server.	16 lat temu