Parses the value and then re-formats it to conform to the formatting options, folding the value if necessary.
a #GMimeFormatOptions or null
a Sender, From, Reply-To, To, Cc, or Bcc header value
a charset (note: unused)
a newly allocated string containing the reformatted value.
Parses the value and then re-formats it to conform to the formatting options, folding the value if necessary.