add forward-confirmed reverse DNS
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@@ -2265,6 +2265,7 @@ function rDNS($ip_addr) {
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if (!$config['dns_system']) {
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$host = gethostbyaddr($ip_addr);
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$isip = filter_var($host, FILTER_VALIDATE_IP);
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} else {
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$resp = shell_exec_error('host -W 1 ' . $ip_addr);
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if (preg_match('/domain name pointer ([^\s]+)$/', $resp, $m))
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@@ -2273,6 +2274,10 @@ function rDNS($ip_addr) {
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$host = $ip_addr;
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}
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if ($config['fcrdns'] && !$isip && gethostbyname($host) != $ip_addr) {
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$host = $ip_addr;
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}
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if ($config['cache']['enabled'])
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cache::set('rdns_' . $ip_addr, $host);
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