don't throw UnknownHostException from InetAddress.getByName("0.0.0.0")

0.0.0.0 means any local interface, which is commonly used by servers
which wish to listen on all interfaces.

classpath/java/net/InetAddress.java

@@ -19,9 +19,6 @@ public class InetAddress {
   private InetAddress(String name) throws UnknownHostException {
     this.name = name;
     this.ip = ipv4AddressForName(name);
-    if (ip == 0) {
-        throw new UnknownHostException(name);
-    }
   }
 
   public String getHostName() {

classpath/java/util/Arrays.java

@@ -286,6 +286,24 @@ public class Arrays {
     return true;
   }
 
+  public static boolean equals(byte[] a, byte[] b) {
+    if(a == b) {
+      return true;
+    }
+    if(a == null || b == null) {
+      return false;
+    }
+    if(a.length != b.length) {
+      return false;
+    }
+    for(int i = 0; i < a.length; i++) {
+      if(a[i] != b[i]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   public static <T> List<T> asList(final T ... array) {
     return new AbstractList<T>() {
       public int size() {

test/Misc.java

@@ -135,7 +135,7 @@ public class Misc {
     }
   }
 
-  public static void main(String[] args) {
+  public static void main(String[] args) throws Exception {
     zam();
 
     Bim bim = new Baz();
@@ -287,6 +287,10 @@ public class Misc {
     } catch (IOException e) {
       throw new RuntimeException(e);
     }
+
+    expect(java.util.Arrays.equals
+	   (new byte[] { 0, 0, 0, 0 },
+	    java.net.InetAddress.getByName("0.0.0.0").getAddress()));
   }
 
   protected class Protected { }