(deps) replace hexyl with hexhex (#18)

Since we don't want to add too many dependencies for now, use our own
small hexdump lib `hexhex` instead of `hexyl`.

Reviewed-on: #18
Co-authored-by: ddidderr <ddidderr@paul.network>
Co-committed-by: ddidderr <ddidderr@paul.network>

src/main.rs

@@ -3,6 +3,7 @@ use std::sync::mpsc;
 use std::thread::{self, JoinHandle};
 
 mod proto;
+use hexhex::print_hex;
 use proto::DNSHeader;
 
 fn listen() -> (
@@ -32,13 +33,6 @@ fn listen() -> (
     )
 }
 
-fn print_hex(bytes: &[u8]) {
-    let stdout = std::io::stdout();
-    let mut stdout = stdout.lock();
-    let mut hxp = hexyl::Printer::new(&mut stdout, true, hexyl::BorderStyle::None, false);
-    let _ = hxp.print_all(bytes);
-}
-
 fn main() {
     let (thread_udp, _thread_udp_tx, thread_udp_rx) = listen();