Add unmaintained buf_redux (#1614)

* Add unmaintained advisory of buf_redux

Fixes #1602

* Fil in the advisory

* Wording fixes

* Typo fix

* Wording fixes

* Grammar

* Alloc not core crate for Vec

* Add fork option

---------

Co-authored-by: pinkforest <36498018+pinkforest@users.noreply.github.com>

crates/buf_redux/RUSTSEC-0000-0000.md

@@ -0,0 +1,32 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "buf_redux"
+date = "2023-01-24"
+url = "https://github.com/abonander/buf_redux/issues"
+informational = "unmaintained"
+
+[versions]
+patched = []
+```
+
+# buf_redux is Unmaintained
+
+Last release was over three years ago.
+
+The maintainer(s) have been unreachable to respond to any issues that may or may not include security issues.
+
+The repository is now archived and there is no security policy in place to contact the maintainer(s) otherwise.
+
+The safety-undocumented unsafe in the crate may or may not be safe to use.
+
+The crate also has a current future incompatibility warning [buf_redux/23](https://github.com/abonander/buf_redux/issues/23).
+
+## Possible Alternatives
+
+The below may or may not provide alternative(s)
+
+- Rust alloc / std vec::Vec, collections::VecDeque
+- [buffer-redux](https://crates.io/crates/buffer-redux) - fork
+- [bytes](https://crates.io/crates/bytes)
+- [crates.io search for 'buffer'](https://crates.io/keywords/buffer)