Description:
------------
fsockopen fails when connecting to "localhost" (which worked with earlier versions e.g. 5.0.2).
connection to "127.0.0.1" still works

Reproduce code:
---------------
<?php
echo '<br>localhost<br>';
$fp = fsockopen ("localhost", 3333, $errno, $errstr, 30);
if (!$fp) {
   echo "$errstr ($errno)<br />\n";
} else {
   fputs ($fp, "GET / HTTP/1.0\r\n\r\n");
   while (!feof($fp)) {
       echo fgets($fp,128);
   }
   fclose($fp);
}
echo '<br>127.0.0.1<br>';
$fp = fsockopen ("127.0.0.1", 3333, $errno, $errstr, 30);
if (!$fp) {
   echo "$errstr ($errno)<br />\n";
} else {
   fputs ($fp, "GET / HTTP/1.0\r\n\r\n");
   while (!feof($fp)) {
       echo fgets($fp,128);
   }
   fclose($fp);
}
?>

Expected result:
----------------
Connection refused in both examples, not "php_network_getaddresses: getaddrinfo failed" when connecting to "localhost"

Actual result:
--------------
ocalhost

Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: Name or service not known in /www/html/tcl.test.php on line 7

Warning: fsockopen() [function.fsockopen]: unable to connect to localhost:3333 (Unknown error) in /www/html/tcl.test.php on line 7
(1077539444)

127.0.0.1

Warning: fsockopen() [function.fsockopen]: unable to connect to 127.0.0.1:3333 (Connection refused) in /www/html/tcl.test.php on line 18
Connection refused (111)