Revproxy is working. Added example cgi script

cgi-scripts/agena-cgi/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "agena-cgi"
+version = "0.1.0"
+authors = ["int 80h <int@80h.dev>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

cgi-scripts/agena-cgi/src/main.rs

@@ -0,0 +1,15 @@
+use std::env;
+
+// Base url of agena proxy
+const BASE: &'static str = "gemini://example.com/";
+
+fn main() {
+    let query = match env::var("QUERY_STRING") {
+        Ok(q) => q,
+        _ => { 
+            println!("10\tGopher url:\r\n");
+            return;
+        },
+    };
+    println!("30\t{}{}\r\n", BASE, query);
+}