FtpFileObject.getChildren() should throw

org.apache.commons.vfs2.FileNotFoundException instead of
java.io.FileNotFoundException #638

src/changes/changes.xml

@@ -207,7 +207,8 @@ The <action> type attribute can be add,update,fix,remove.
         org.apache.commons.vfs2.provider.http.HttpFileObject.doListChildren() now throws UnsupportedOperationException instead of Exception.
       </action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Pick up exec-maven-plugin version from parent POM.</action>
-      <action type="fix" dev="ggregory" due-to="Anthony Goubard">Fixed commons-vfs2-sandbox module not compiling due to missing imports and library #634.</action> 
+      <action type="fix" dev="ggregory" due-to="Anthony Goubard">Fixed commons-vfs2-sandbox module not compiling due to missing imports and library #634.</action>
+      <action type="fix" dev="ggregory" due-to="Marek Sunda, Gary Gregory, Arnout Engelen">FtpFileObject.getChildren() should throw org.apache.commons.vfs2.FileNotFoundException instead of java.io.FileNotFoundException #638.</action> 
       <!-- ADD -->
       <action type="add" issue="VFS-848" dev="ggregory" due-to="beise, Gary Gregory">
         Config option for trailing slash in webdav URI #425.