process.features.ipv6
稳定性: 0 - 已弃用。此属性始终为真，任何基于它的检查都是多余的。
¥Stability: 0 - Deprecated. This property is always true, and any checks based on it are redundant.
如果当前 Node.js 构建包含对 IPv6 的支持，则布尔值为 true。
¥A boolean value that is true if the current Node.js build includes support for IPv6.
由于所有 Node.js 版本都支持 IPv6，因此此值始终为 true。
¥Since all Node.js builds have IPv6 support, this value is always true.