[Citadel Development] upload.c: skeleton code for load_attachments_from_message()

[Citadel Development] uploads.c: made the syslog less verbose

Also documented the JSON return values in api.txt

[Citadel Development] Re: view_mail.js: more improvements to mail forwarding

While most of us like the old interface just fine ( unless we are stuck with a phone, and dont feel like doing imap  ), i know it does turn off some new comers.  Might not hurt to do something like that so they know the future is not vaporware... They might stick around, or at least make plans to