Merge branch 'lt/mailinfo-handle-attachment-more-sanely'

A patch attached as application/octet-stream (e.g. not text/*) were
mishandled, not correctly honoring Content-Transfer-Encoding
(e.g. base64).

* lt/mailinfo-handle-attachment-more-sanely:
mailinfo: don't require "text" mime type for attachments

diff --cc builtin/mailinfo.c
Simple merge