Change PGP/Inline behavior
* src/mail.cpp (Mail::append_to_inline_body): New. (Mail::inline_body_to_body): Put cached body into oom body. * src/mail.h: Update accordingly. * src/mailitem-events.cpp (EVENT_SINK_INVOKE): Call inline_body_to_body. * src/mimemaker.cpp (sink_string_write): New. (finalize_message): Don't change message class for inline. (create_top_encryption_header): No MIME header for inline. (mime_encrypt): Use sink_string_write if inline.
Instead of our nice trick to do the S/MIME to MIME conversion
with a text/plain part we now update the body. This is because
Exchange Online did not like our trick. The new code should
be a bit more robust.
And yes caching stuff in the mail object is my hammer.
- GnuPG-Bug-Id: T3662