MailCore/mailcore2 — pull request #344 by qvacua (2013-09-01 08:51:56+00:00)
Title: add Content-Description to attachment

I used `contentDescription->encodedMIMEHeaderValue()->bytes()` for `mailmime_fields_new_with_data()`. I followed the following from http://www.ietf.org/rfc/rfc2045.txt:

> 8. Content-Description Header Field
>
> The ability to associate some descriptive information with a given
> body is often desirable. For example, it may be useful to mark an
> "image" body as "a picture of the Space Shuttle Endeavor." Such text
> may be placed in the Content-Description header field. This header
> field is always optional.
>
> description := "Content-Description" ":" *text
>
> The description is presumed to be given in the US-ASCII character
> set, although the mechanism specified in RFC 2047 may be used for
> non-US-ASCII Content-Description values.

Hope I got it right...