cmake LWS_HAVE_GETIFADDRS examples

warmcat/libwebsockets CMakeLists.txt :652

CHECK_FUNCTION_EXISTS(getifaddrs LWS_HAVE_GETIFADDRS)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :576

CHECK_FUNCTION_EXISTS(getifaddrs LWS_HAVE_GETIFADDRS)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :559

CHECK_FUNCTION_EXISTS(getifaddrs LWS_HAVE_GETIFADDRS)