latest: Smarty3 forward compatibility

1.14:
Added check to circument adduser plugin's "registered only" option.

1.13:
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Force spamblock plugin to properly realize "time to live" of captchas.
Previously, even though captchas where displayed, it did not matter what
the user entered.

1.11:
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Fix XHTML validity of checked="checked"

1.10:
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Introcuce new "issue counter".