set Busy- and Blocking-Threads to daemon mode (they will now not prevent

YaCy from termination if still running)

source/net/yacy/kelondro/workflow/AbstractBlockingThread.java

@@ -32,6 +32,10 @@ public abstract class AbstractBlockingThread<J extends WorkflowJob> extends Abst
     private WorkflowProcessor<J> manager = null;
     private final static ConcurrentLog log = new ConcurrentLog("AbstractBlockingThread");
 
+    public AbstractBlockingThread() {
+        super();
+    }
+    
     @Override
     public void setManager(final WorkflowProcessor<J> manager) {
         this.manager = manager;

source/net/yacy/kelondro/workflow/AbstractBusyThread.java

@@ -45,6 +45,7 @@ public abstract class AbstractBusyThread extends AbstractThread implements BusyT
     private long busySleep = Long.MIN_VALUE;
     
     public AbstractBusyThread(long idleSleep, long busySleep) {
+        super();
         this.idleSleep = idleSleep;
         this.busySleep = busySleep;
     }

source/net/yacy/kelondro/workflow/AbstractThread.java

@@ -48,6 +48,10 @@ public abstract class AbstractThread extends Thread implements WorkflowThread {
     private   String monitorURL = null;
     private   long threadBlockTimestamp = System.currentTimeMillis();
 
+    public AbstractThread() {
+        this.setDaemon(true);
+    }
+    
     protected final void announceThreadBlockApply() {
         // shall only be used, if a thread blocks for an important reason
         // like a socket connect and must renew the timestamp to correct

source/net/yacy/kelondro/workflow/InstantBlockingThread.java

@@ -44,6 +44,8 @@ public class InstantBlockingThread<J extends WorkflowJob> extends AbstractBlocki
     private static final ConcurrentMap<Long, String> jobs = new ConcurrentHashMap<Long, String>();
 
     public InstantBlockingThread(final WorkflowProcessor<J> manager) {
+        super();
+        
         // jobExec is the name of a method of the object 'env' that executes the one-step-run
         // jobCount is the name of a method that returns the size of the job