Specify port when trying to determine egress interface. (#59)

Specifying the DNS port when trying to route to a root server seems to work better (at least on Mac with temurin JDK 17).

Author: pgalbraith

README.md

@@ -76,7 +76,8 @@ UUID anotherUuid = gen.generate();
 If your machine has a standard IP networking setup, the `Generators.egressTimeBasedGenerator` (added in JUG 4.1) 
 factory method will try to determine which network interface corresponds to the default route for 
 all outgoing network traffic, and use that for creating a time based generator.
-This is likely a  good choice for common usage scenarios if you want a version 1 UUID generator:
+This is likely a good choice for common usage scenarios if you want a version 1 UUID generator, but unfortunately
+is known not to work reliably on some platforms.
 
 ```java
 TimeBasedGenerator gen = Generators.egressTimeBasedGenerator();

src/main/java/com/fasterxml/uuid/EthernetAddress.java

@@ -325,7 +325,7 @@ public static EthernetAddress fromEgressInterface()
         String roots = "abcdefghijklm";
         int index = new Random().nextInt(roots.length());
         String name = roots.charAt(index) + ".root-servers.net";
-        InetSocketAddress externalAddress = new InetSocketAddress(name, 0);
+        InetSocketAddress externalAddress = new InetSocketAddress(name, 53);
         if (externalAddress.isUnresolved()) {
             externalAddress = new InetSocketAddress("1.1.1.1", 0);
         }