Add Message-Authenticator as first attribute in order to mitigate CVE…

…-2024-3596 variant

src/main/java/org/tinyradius/packet/RadiusPacket.java

@@ -865,7 +865,7 @@ protected void encodePacket(OutputStream out, String sharedSecret, RadiusPacket
  }
  }
  if (!exists) {
- this.attributes.add(new RadiusAttribute(MESSAGE_AUTHENTICATOR, new byte[16]));
+ this.attributes.addFirst(new RadiusAttribute(MESSAGE_AUTHENTICATOR, new byte[16]));
  }
  }