[HER-1711] Some Internationalized Domain Name seeds ignored by Heritrix

* EnhDirectoryResource.java
    ensure files shown for edit or written-back to disk handled as UTF-8
* ConfigFile.java
    read file as UTF-8

commons/src/main/java/org/archive/spring/ConfigFile.java

@@ -18,9 +18,11 @@
  */
 package org.archive.spring;
 
-import java.io.FileReader;
-import java.io.FileWriter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 
@@ -46,7 +48,9 @@ public class ConfigFile extends ConfigPath implements ReadSource, WriteTarget {
             if(!getFile().exists()) {
                 getFile().createNewFile();
             }
-            return new FileReader(getFile());
+            return new InputStreamReader(
+                    new FileInputStream(getFile()),
+                    "UTF-8");
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
@@ -58,7 +62,9 @@ public class ConfigFile extends ConfigPath implements ReadSource, WriteTarget {
     
     public Writer obtainWriter(boolean append) {
         try {
-            return new FileWriter(getFile(), append);
+            return new OutputStreamWriter(
+                    new FileOutputStream(getFile(), append),
+                    "UTF-8");
         } catch (IOException e) {
             throw new RuntimeException(e);
         }