Update: Partial implementation of su3 news with atom feed.

No spec yet, just followed str4d's testnews.atom.xml proposal.
Atom parsing is tested, su3 part is incomplete and untested.
Todo: add spec to http://i2p-projekt.i2p/en/docs/spec/updates,
finish su3 and test.

core/java/src/net/i2p/crypto/SU3File.java

@@ -71,6 +71,8 @@ public class SU3File {
     public static final int TYPE_XML = 1;
     /** @since 0.9.15 */
     public static final int TYPE_HTML = 2;
+    /** @since 0.9.17 */
+    public static final int TYPE_XML_GZ = 3;
 
     public static final int CONTENT_UNKNOWN = 0;
     public static final int CONTENT_ROUTER = 1;

core/java/src/net/i2p/update/UpdateType.java

@@ -25,5 +25,7 @@ public enum UpdateType {
     /** @since 0.9.9 */
     ROUTER_SIGNED_SU3,
     /** @since 0.9.15 */
-    NEWS_SU3
+    NEWS_SU3,
+    /** @since 0.9.17 */
+    ROUTER_DEV_SU3
 }