restructure folders

https-tls/rustls/README.md

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+# TLS / HTTPS (via Rustls)
+
+## Usage
+
+### Certificate
+
+We put the self-signed certificate in this directory as an example
+but your browser would complain that it isn't secure.
+So we recommend to use [`mkcert`] to trust it. To use local CA, you should run:
+
+```bash
+mkcert -install
+```
+
+If you want to generate your own cert/private key file, then run:
+
+```bash
+mkcert 127.0.0.1 localhost
+```
+
+For `rsa` keys use `rsa_private_keys` function instead `pkcs8_private_keys`
+```rs
+let mut keys = pkcs8_private_keys(key_file).unwrap(); // pkcs8
+let mut keys = rsa_private_keys(key_file).unwrap(); // rsa
+```
+
+[`mkcert`]: https://github.com/FiloSottile/mkcert
+
+### Running the Example Server
+
+```bash
+cd security/rustls
+cargo run # (or ``cargo watch -x run``)
+# Started http server: 127.0.0.1:8443
+```
+
+If you prefer reloading you can substitute `cargo watch -x run`.
+That requires you install the `cargo-watch` crate.
+
+### web client
+
+- curl: ``curl -v https://127.0.0.1:8443/index.html --compressed -k``
+- browser: [https://127.0.0.1:8443/index.html](https://127.0.0.1:8443/index.html)