cmake HAVE_IPV6_V6ONLY examples

alibaba/AliSQL cmake/os/Windows.cmake :144 

CHECK_SYMBOL_EXISTS(IPV6_V6ONLY  "winsock2.h;ws2ipdef.h" HAVE_IPV6_V6ONLY)

arkdb/arkproxy cmake/os/Windows.cmake :143 

CHECK_SYMBOL_EXISTS(IPV6_V6ONLY  "winsock2.h;ws2ipdef.h" HAVE_IPV6_V6ONLY)

alibaba/AliSQLBackup cmake/os/Windows.cmake :142 

CHECK_SYMBOL_EXISTS(IPV6_V6ONLY  "winsock2.h;ws2ipdef.h" HAVE_IPV6_V6ONLY)