i2psnark: Don't fail to start if data directory not found (ticket #2166)

Try to create dir if doesn't exist
Hide add and create sections if dir not writable
Remove 403 handler, don't want it for standalone hostname check

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 18;
+    public final static long BUILD = 19;
 
     /** for example "-test" */
     public final static String EXTRA = "";