value issue in additional header about lua-resty-upload

[agentzh]

@feifangit This is the expected behavior of curl's -F option. For -F "uuid=123", curl generates something like the following:

------------------------------4471b0132daf
Content-Disposition: form-data; name="uuid"

123
------------------------------4471b0132daf--

So the value 123 becomes the content body of the corresponding part.

[feifangit]

Thanks for you explanation, you enlightened me :P