The file_server example cannot handle unicode filename

[Lin Cheng]

echo "hello" > priv/中文.html
make run
curl http://localhost:8080/中文.html

Then the server crashes

[Loïc Hoguin]

Please send a patch if you can, shouldn't be too difficult to fix.

[Loïc Hoguin]

Done in 4f26d6a. Closing, thanks!