[Dovecot] (Single instance) attachment storage

[William Blunn]

Timo Sirainen wrote:
> BTW. I was thinking about using "number of characters per base64 line" rather than "number of cells". I don't think it's required that line ends with a complete cell.

You're right.

Looking at RFC2045, whitespace aside, the entire stream must be an 
integer quantity of 4 character cells. But the whitespace can appear 
anywhere.

So yes, number of characters per line. So my base64(19) becomes base64(76).

Bill