wtv-disk fixes

- Fix Karaoke/Music diskmaps not working if partition didn't already exist
- Fix downloadlist sending backslash on windows hosts (did not break functionality tho)

zefie_wtvp_minisrv/WTVDownloadList.js

@@ -160,6 +160,7 @@ class WTVDownloadList {
         }
         this.download_list += "GET " + file + "\n";
 
+		source = source.replace(/\\/g, "/");
         this.download_list += "group: " + group + "-UPDATE\n";
         this.download_list += "location: " + source + "\n";
         this.download_list += "file-permission: " + file_permission + "\n";