cmake LWS_HAVE_IN6ADDR_H examples

warmcat/libwebsockets CMakeLists.txt :669 

CHECK_C_SOURCE_COMPILES("#include <malloc.h>\nvoid main(void) { while(1) ; } void xxexit(void){}" LWS_HAVE_IN6ADDR_H)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :633 

CHECK_INCLUDE_FILE(in6addr.h LWS_HAVE_IN6ADDR_H)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :616 

CHECK_INCLUDE_FILE(in6addr.h LWS_HAVE_IN6ADDR_H)