RT-Thread-packages/esp-idf @ v4.0.4

peilaus alkaen https://github-proxy.rt-thread.io/RT-Thread-packages/esp-idf.git

xueyunfei df23bbe8e1 backport bugfix lwip for v4.0		5 vuotta sitten
..
CMakeLists.txt	6771eead80 examples: use new component registration api	6 vuotta sitten
Kconfig.projbuild	28cf1c83df examples/protocols/sockets: use common network component	6 vuotta sitten
component.mk	5a76f1af19 BSD Socket examples	7 vuotta sitten
udp_client.c	df23bbe8e1 backport bugfix lwip for v4.0	5 vuotta sitten