fix for path with char code > 255

(causing index out of bound exception)
+ test cas for it

source/net/yacy/cora/document/id/MultiProtocolURL.java

@@ -487,9 +487,10 @@ public class MultiProtocolURL implements Serializable, Comparable<MultiProtocolU
      */
     private void escapePath() {
         final StringBuilder ptmp = new StringBuilder(this.path.length() + 10);
-        final byte[] bpath = UTF8.getBytes(this.path);
         boolean modified = false;
-        for (byte b : bpath) {
+        final int len = this.path.length();
+        for (int i = 0; i < len; i++) {
+            int b = this.path.charAt(i) & 0xFF; // protect index out of bound exception (TODO: do we need to handle hichars > 255 or 2-byte chars here ?)
             if (UNRESERVED_PATH.get(b)) {
                 ptmp.append((char) b);
             } else {

test/net/yacy/cora/document/id/MultiProtocolURLTest.java

@@ -152,7 +152,9 @@ public class MultiProtocolURLTest {
             // teststring , expectedresult
             new String[]{"http://www.heise.de/newsticker/thema/%23saukontrovers", "http://www.heise.de/newsticker/thema/%23saukontrovers"}, // http://mantis.tokeek.de/view.php?id=519
             new String[]{"http://www.heise.de/newsticker/thema/#saukontrovers", "http://www.heise.de/newsticker/thema/"},
-            new String[]{"http://www.liferay.com/community/wiki/-/wiki/Main/Wiki+Portlet", "http://www.liferay.com/community/wiki/-/wiki/Main/Wiki+Portlet"} // http://mantis.tokeek.de/view.php?id=559
+            new String[]{"http://www.liferay.com/community/wiki/-/wiki/Main/Wiki+Portlet", "http://www.liferay.com/community/wiki/-/wiki/Main/Wiki+Portlet"}, // http://mantis.tokeek.de/view.php?id=559
+            new String[]{"http://de.wikipedia.org/wiki/Philippe_Ariès", "http://de.wikipedia.org/wiki/Philippe_Ari%E8s"} // utf-8 2 byte char
+            // new String[]{"http://de.wikipedia.org/wiki/Philippe_Ariès", "http://de.wikipedia.org/wiki/Philippe_Ari%C3%A8s"} // above formal correct for utf8 codepage
         };
 
         for (String[] testString : testStrings) {