And while we're UTF8'ing, we should also replace the DirectoryString in
the ContentHints attribute:
ContentHints ::= SEQUENCE {
contentDescription UTF8String SIZE(1..MAX) OPTIONAL,
contentType OBJECT IDENTIFIER }
I don't see any reason to do the SIZE(1..MAX). It made sense for the old
strings, but I don't think we need it here. Can we elide it?
--Paul Hoffman, Director
--Internet Mail Consortium