Description:
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Looking at documentation for geoip_country_code_by_name it lists ISO3166 codes on 
an external url. This url is wrong and links back to documentation page. Text is 
correct though.

Test script:
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To produce:
- go to http://www.php.net/manual/en/function.geoip-country-code-by-name.php
- scroll down to Notes section
- try clicking on maxmind link providing codes

Expected result:
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Being redirected to http://www.maxmind.com/en/iso3166

Actual result:
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Page being reloaded.