[issue6302] Add decode_header_as_string method to email.utils

[R. David Murray]

Changes by R. David Murray <rdmurray at bitdance.com>:


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title: email.header.decode_header data types are inconsistent and incorrectly documented -> Add decode_header_as_string method to email.utils
type: behavior -> feature request

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6302>
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