* Config files: Add some encoding help

* DataHelper, Router:
      - Save config files in UTF-8 rather than the default encoding,
        since we read them in UTF-8
    * jetty.xml: Change encoding to UTF-8
    * logs.jsp: Add system encoding
    * NTCP: Clean up clock skew shitlist message
    * Shitlist: Clean up expire message
    * WorkingDir: Ensure modified files are processed with UTF-8 encoding

apps/routerconsole/jsp/logs.jsp

@@ -19,6 +19,7 @@ I2P <jsp:getProperty name="helper" property="version" /><br />
 <%=System.getProperty("os.name")%> <%=System.getProperty("os.arch")%> <%=System.getProperty("os.version")%><br />
 CPU <%=net.i2p.util.NativeBigInteger.cpuModel()%> (<%=net.i2p.util.NativeBigInteger.cpuType()%>)<br />
 jbigi <%=net.i2p.util.NativeBigInteger.loadStatus()%><br />
+Encoding <%=System.getProperty("file.encoding")%><br>
  </p>
  <hr />
  <jsp:useBean class="net.i2p.router.web.LogsHelper" id="logsHelper" scope="request" />