Node.js HTTP/HTTPS Tunneling Agent

The `tunnel` package, currently at version 0.0.6, provides `http.Agent` and `https.Agent` implementations specifically designed for tunneling HTTP and HTTPS traffic through various types of proxies (HTTP over HTTP, HTTPS over HTTP, HTTP over HTTPS, HTTPS over HTTPS). It targets extremely old Node.js environments, supporting versions `0.6.11` through `0.7.0`, and `0.7.3` (as indicated by its `engines` field). This package is considered abandoned, with no new releases or maintenance since 2014, and is not compatible with modern Node.js runtimes. Its primary differentiator was its early support for detailed proxy configurations for different tunneling scenarios within the Node.js `http` module ecosystem, but it has been superseded by actively maintained alternatives.