Replace other usages of deprecated split().

libraries/auth/swekey/swekey.auth.lib.php

@@ -21,7 +21,7 @@ function Swekey_auth_check()
 	if ($_SESSION['SWEKEY']['ENABLED'] && empty($_SESSION['SWEKEY']['CONF_LOADED'])) {
         $_SESSION['SWEKEY']['CONF_LOADED'] = true;
         $_SESSION['SWEKEY']['VALID_SWEKEYS'] = array();
-        $valid_swekeys = split("\n",@file_get_contents($confFile));
+        $valid_swekeys = explode("\n", @file_get_contents($confFile));
         foreach ($valid_swekeys as $line) {
             if (preg_match("/^[0-9A-F]{32}:.+$/", $line) != false)
 			{

libraries/import/csv.php

@@ -101,7 +101,7 @@ if (!$analyze) {
     } else {
         $sql_template .= ' (';
         $fields = array();
-        $tmp   = split(',( ?)', $csv_columns);
+        $tmp   = preg_split('/,( ?)/', $csv_columns);
         foreach ($tmp as $key => $val) {
             if (count($fields) > 0) {
                 $sql_template .= ', ';

libraries/import/ldi.php

@@ -90,7 +90,7 @@ if ($skip_queries > 0) {
 }
 if (strlen($ldi_columns) > 0) {
     $sql .= ' (';
-    $tmp   = split(',( ?)', $ldi_columns);
+    $tmp   = preg_split('/,( ?)/', $ldi_columns);
     $cnt_tmp = count($tmp);
     for ($i = 0; $i < $cnt_tmp; $i++) {
         if ($i > 0) {