minimal-effort support for really old browsers
- internet explorer 6 can browse, upload files, mkdir
- internet explorer 9 can also play mp3s, zip selected files
- internet explorer 10 and newer has near-full support
- the final version of chrome and firefox on xp have full support
- netscape 4.5 works well enough, text is yellow on white
- netscape 4.0 segfaults (rip)
on a more serious note,
- fix multiselect zip diving into unselected subfolders
- decode urlform messages to plaintext