Crawls can be restricted to specific countries. This uses the country code that can be computed from
the IP of the server that hosts the page. The filter is not a regular expressions but a list of country codes, separated by comma.
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<inputtype="radio"name="countryMustMatchSwitch"id="noCountryMustMatchSwitch"value="false" #(countryMustMatchSwitchChecked)#::checked="checked"#(/countryMustMatchSwitchChecked)#/>no country code restriction<br/>
<inputtype="radio"name="countryMustMatchSwitch"id="noCountryMustMatchSwitch"value="0" #(countryMustMatchSwitchChecked)#::checked="checked"#(/countryMustMatchSwitchChecked)#/>no country code restriction<br/>