fixed Content-Type and Content-Length for FCGI and NGINX setup

Signed-off-by: Udagawa Kaito <umireon@gmail.com>
Content-Type and Length for dash and underscore

Signed-off-by: Udagawa Kaito <umireon@gmail.com>
Merge pull request #1618 from umireon/input_content_type_length

fixed Content-Type and Content-Length for FCGI and NGINX setup