deal with spaces in filenames cleanly

apps/syndie/jsp/viewattachment.jsp

@@ -6,9 +6,9 @@ response.setContentType(ArchiveViewerBean.getAttachmentContentType(params));
 boolean inline = ArchiveViewerBean.getAttachmentShouldShowInline(params);
 String filename = ArchiveViewerBean.getAttachmentFilename(params);
 if (inline)
-  response.setHeader("Content-Disposition", "inline; filename=" + filename);
+  response.setHeader("Content-Disposition", "inline; filename=\"" + filename + "\"");
 else
-  response.setHeader("Content-Disposition", "attachment; filename=" + filename);
+  response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
 int len = ArchiveViewerBean.getAttachmentContentLength(params);
 if (len >= 0)
   response.setContentLength(len);