Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Tower Service
+
+The foundational `Service` trait that [Tower] is based on.
+
+[![Crates.io][crates-badge]][crates-url]
+[![Documentation][docs-badge]][docs-url]
+[![Documentation (master)][docs-master-badge]][docs-master-url]
+[![MIT licensed][mit-badge]][mit-url]
+[![Build Status][actions-badge]][actions-url]
+[![Discord chat][discord-badge]][discord-url]
+
+[crates-badge]: https://img.shields.io/crates/v/tower-service.svg
+[crates-url]: https://crates.io/crates/tower-service
+[docs-badge]: https://docs.rs/tower-service/badge.svg
+[docs-url]: https://docs.rs/tower-service
+[docs-master-badge]: https://img.shields.io/badge/docs-master-blue
+[docs-master-url]: https://tower-rs.github.io/tower/tower_service
+[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[mit-url]: LICENSE
+[actions-badge]: https://github.com/tower-rs/tower/workflows/CI/badge.svg
+[actions-url]:https://github.com/tower-rs/tower/actions?query=workflow%3ACI
+[discord-badge]: https://img.shields.io/discord/500028886025895936?logo=discord&label=discord&logoColor=white
+[discord-url]: https://discord.gg/EeF3cQw
+
+## Overview
+
+The [`Service`] trait provides the foundation upon which [Tower] is built. It is a
+simple, but powerful trait. At its heart, `Service` is just an asynchronous
+function of request to response.
+
+```
+async fn(Request) -> Result<Response, Error>
+```
+
+Implementations of `Service` take a request, the type of which varies per
+protocol, and returns a future representing the eventual completion or failure
+of the response.
+
+Services are used to represent both clients and servers. An *instance* of
+`Service` is used through a client; a server *implements* `Service`.
+
+By using standardizing the interface, middleware can be created. Middleware
+*implement* `Service` by passing the request to another `Service`. The
+middleware may take actions such as modify the request.
+
+[`Service`]: https://docs.rs/tower-service/latest/tower_service/trait.Service.html
+[Tower]: https://crates.io/crates/tower
+## License
+
+This project is licensed under the [MIT license](LICENSE).
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in Tower by you, shall be licensed as MIT, without any additional
+terms or conditions.