[golang/go] net/http: package doc comment is missing [1.26 backport]

### ROOT CAUSE The root cause of the issue is the absence of a package documentation comment in the `net/http` package. This omission leads to a lack of clarity for developers using the package, as they miss out on essential information about the package's purpose and functionality. ### CODE FIX To address this issue, we need to add a comprehensive documentation comment to the `net/http` package. This comment should succinctly describe the package's purpose, its main functionalities, and any important notes. Here is the code fix:

// Package http implements an HTTP server and client, including full support for HTTP/1.1.
// It provides functions and types for creating HTTP servers and clients, handling requests,
// setting up routes, and more. The package is designed to handle various HTTP interactions
// efficiently and securely, adhering to RFC 2616 specifications.


This comment should be placed at the top of the `http.go` file in the Go source code repository. By adding this documentation, developers will have clear guidance on the package's capabilities and usage.