Description:
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iconv_mime_encode is supposed to compose and return a string that represents a valid MIME  header field.

However, headers like To, CC and others with email addresses don't fit into simple $field_name => $field_value scheme.  Please note that these arguments may contain user submitted data and would contain any characters.

The function should accept extra argument(s) for email addresses, and check/encode characters like "'<> with quoted-printable encoding too, and others if needed, and do not encode ascii strings that should not be encoded.  Please see http://www.faqs.org/rfcs/rfc2822 for valid email header syntax.


Reproduce code:
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From manual page: function.iconv-mime-encode
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