Rollup merge of rust-lang#59748 - agnxy:trademark, r=skade

Add summary and reference to Rust trademark guide

Fix rust-lang#53287
cc @steveklabnik

README.md

@@ -261,3 +261,19 @@ BSD-like licenses.
 
 See [LICENSE-APACHE](LICENSE-APACHE), [LICENSE-MIT](LICENSE-MIT), and
 [COPYRIGHT](COPYRIGHT) for details.
+
+## Trademark
+[trademark]: #trademark
+
+The Rust programming language is an open source, community project governed
+by a core team. It is also sponsored by the Mozilla Foundation (“Mozilla”),
+which owns and protects the Rust and Cargo trademarks and logos
+(the “Rust Trademarks”).
+
+If you want to use these names or brands, please read the [media guide][media-guide].
+
+Third-party logos may be subject to third-party copyrights and trademarks. See
+[Licenses][policies-licenses] for details.
+
+[media-guide]: https://www.rust-lang.org/policies/media-guide
+[policies-licenses]: https://www.rust-lang.org/policies/licenses