SOMAXCONN is expected to be defined in this header, but for the esp32
port is found in net/if.h from newlib.
Avoid the issue by including the net/if.h header in sys/socket.h so that
compatibility is preserved.
Signed-off-by: Francesco Giancane <francesco.giancane@accenture.com>
Merges https://github.com/espressif/esp-idf/pull/4637