fix mdns INBOUND_BUFFER_SIZE to be 64k as required by UDP to avoid truncation (#515)

Co-authored-by: Tibor Klajnscek <tk@numfum.com>

Author: tklajnscek

mdns/src/conn/mod.rs

@@ -22,7 +22,7 @@ mod conn_test;
 
 pub const DEFAULT_DEST_ADDR: &str = "224.0.0.251:5353";
 
-const INBOUND_BUFFER_SIZE: usize = 512;
+const INBOUND_BUFFER_SIZE: usize = 65535;
 const DEFAULT_QUERY_INTERVAL: Duration = Duration::from_secs(1);
 const MAX_MESSAGE_RECORDS: usize = 3;
 const RESPONSE_TTL: u32 = 120;