I2CP:

- Verify crypto key pair in LS
 - Verfiy same dest as before in LS
Router: Don't try to use an unavailable sig type for the router,
   even if it's the default
RouterInfo: Work around unsupported raw signatures for
   RI Ed25519 sig type

apps/i2ptunnel/java/src/net/i2p/i2ptunnel/web/EditBean.java

@@ -188,8 +188,7 @@ public class EditBean extends IndexBean {
     
     /** @since 0.9.12 */
     public boolean isSigTypeAvailable(int code) {
-        SigType type = SigType.getByCode(code);
-        return type != null && type.isAvailable();
+        return SigType.isAvailable(code);
     }
     
     /** @since 0.8.9 */