[docs] [issue18243] mktime_tz documentation out-of-date

[R. David Murray]

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


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components: +email
nosy: +barry, r.david.murray
versions: +Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18243>
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