do not flush non-errors to stdout because this is a concurrency issue.

the flush-call appeared very often in thread dumps with high load, so
this hopefully gives some performances

source/net/yacy/kelondro/logging/ConsoleOutErrHandler.java

@@ -138,11 +138,12 @@ public final class ConsoleOutErrHandler extends Handler {
         }
 
         if (record.getLevel().intValue() >= this.splitLevel.intValue()) {
+            this.stdOutHandler.publish(record);
+            this.stdOutHandler.flush();
             this.stdErrHandler.publish(record);
             this.stdErrHandler.flush();
         } else {
             this.stdOutHandler.publish(record);
-            this.stdOutHandler.flush();
         }
     }