added missing blacklist dht cache storage (maybe due to mistakes in

cherry picking)

source/net/yacy/repository/Blacklist.java

@@ -54,7 +54,7 @@ import net.yacy.kelondro.util.SetTools;
 
 public class Blacklist {
 
-    private static final File BLACKLIST_DHT_CACHEFILE = new File("DATA/WORK/BlacklistCache_DHT.ser");
+    private static final File BLACKLIST_DHT_CACHEFILE = new File("DATA/WORK/blacklistCache_DHT.ser");
 
     public enum BlacklistType {
     	DHT, CRAWLER, PROXY, SEARCH, SURFTIPS, NEWS;
@@ -119,6 +119,20 @@ public class Blacklist {
         }
     }
 
+    /**
+     * Close (shutdown) this "sub-system", add more here for shutdown.
+     *
+     * @return void
+     */
+    public synchronized void close() {
+        Log.logFine("Blacklist", "Shutting down blacklists ...");
+
+        // Save DHT cache
+        saveDHTCache();
+
+        Log.logFine("Blacklist", "All blacklists has been shutdown.");
+    }
+
     public final void setRootPath(final File rootPath) {
         if (rootPath == null) {
             throw new NullPointerException("The blacklist root path must not be null.");
@@ -531,8 +545,7 @@ public class Blacklist {
                 final ObjectInputStream in = new ObjectInputStream(new FileInputStream(BLACKLIST_DHT_CACHEFILE));
                 this.cachedUrlHashs.put(BlacklistType.DHT, (HandleSet) in.readObject());
                 in.close();
-            } else {
+                return;
-                this.cachedUrlHashs.put(BlacklistType.DHT, new HandleSet(URIMetadataRow.rowdef.primaryKeyLength, URIMetadataRow.rowdef.objectOrder, 0));
             }
         } catch (final ClassNotFoundException e) {
             Log.logException(e);
@@ -541,5 +554,6 @@ public class Blacklist {
         } catch (final IOException e) {
             Log.logException(e);
         }
+        this.cachedUrlHashs.put(BlacklistType.DHT, new HandleSet(URIMetadataRow.rowdef.primaryKeyLength, URIMetadataRow.rowdef.objectOrder, 0));
     }
 }

source/net/yacy/search/Switchboard.java

@@ -1600,6 +1600,7 @@ public final class Switchboard extends serverSwitch
         this.tables.close();
         Domains.close();
         AccessTracker.dumpLog(new File("DATA/LOG/queries.log"));
+        Switchboard.urlBlacklist.close();
         UPnP.deletePortMapping();
         this.tray.remove();
         try {