- no downcase when using collection modifier

- removed warnings

source/net/yacy/crawler/retrieval/RSSLoader.java

@@ -27,13 +27,10 @@ package net.yacy.crawler.retrieval;
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 import net.yacy.cora.document.ASCII;
 import net.yacy.cora.document.RSSFeed;

source/net/yacy/search/query/QueryModifier.java

@@ -197,7 +197,7 @@ public class QueryModifier {
         String[] s0 = CommonPattern.VERTICALBAR.split(collectionDescription);
         ArrayList<String> sites = new ArrayList<String>(2);
         for (String s: s0) {
-            s = s.trim().toLowerCase();
+            s = s.trim();
             if (s.length() > 0) sites.add(s);
         }
         StringBuilder filterQuery = new StringBuilder(20);