When sending a file using POST with an unsupported encoding, smews answers nothing

[hauspie]

Targets

Issue appears probably on all targets, but was seen at least on linux and mbed_ethernet

Step to reproduce

1. Checkout a fresh smews (bug spotted on develop branch, commit 79a242b)
2. build it using the post_test application
3. Run smews and access the http://ip/post_test/index.html url
4. Using the form Post Request With Data Content Type MultiPart send a file that is not a .txt file (any file whose mime type is application/octet-stream is ok)
5. Submit the file

Expected results

As the mime type is not enabled in the tools/mimeListPost, smews should not support it and returns a 404 or 505 (not quite sure of what the real good behavior must be)

Actual results

Smews outputs nothing. As a results, the browser stalls and eventually times out.