I2PTunnelServer: Clean shutdown after session exception

apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelServer.java

@@ -375,7 +375,9 @@ public class I2PTunnelServer extends I2PTunnelTask implements Runnable {
             } catch (I2PException ipe) {
                 if (_log.shouldLog(Log.ERROR))
                     _log.error("Error accepting - KILLING THE TUNNEL SERVER", ipe);
-                return;
+                // TODO delay and loop if internal router is soft restarting?
+                open = false;
+                break;
             } catch (ConnectException ce) {
                 if (_log.shouldLog(Log.ERROR))
                     _log.error("Error accepting", ce);

apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelTask.java

@@ -15,7 +15,7 @@ public abstract class I2PTunnelTask extends EventDispatcherImpl {
 
     private int id;
     private String name;
-    protected boolean open;
+    protected volatile boolean open;
     private I2PTunnel tunnel;
 
     //protected I2PTunnelTask(String name) {