chore: checkpoint before Python removal

vendor/security-framework/examples/client.rs

@@ -0,0 +1,16 @@
+use security_framework::secure_transport::ClientBuilder;
+use std::io::{Read, Write};
+use std::net::TcpStream;
+
+fn main() {
+    let stream = TcpStream::connect("google.com:443").unwrap();
+    let mut stream = ClientBuilder::new().handshake("google.com", stream).unwrap();
+    println!("negotiated chipher: {:?}", stream.context().negotiated_cipher().unwrap());
+    println!("negotiated version: {:?}", stream.context().negotiated_protocol_version().unwrap());
+
+    stream.write_all(b"GET / HTTP/1.0\r\n\r\n").unwrap();
+    stream.flush().unwrap();
+    let mut buf = vec![];
+    stream.read_to_end(&mut buf).unwrap();
+    println!("{}", String::from_utf8_lossy(&buf));
+}