Merge branch 'master' of https://github.com/gnuboard/g5 into g54_theme2

adm/config_form_update.php

@@ -28,6 +28,14 @@ $cf_social_servicelist = !empty($_POST['cf_social_servicelist']) ? implode(',',
 
 $_POST['cf_title'] = strip_tags($_POST['cf_title']);
 
+$check_keys = array('cf_lg_mid', 'cf_lg_mert_key', 'cf_cert_kcb_cd', 'cf_cert_kcp_cd', 'cf_editor', 'cf_recaptcha_site_key', 'cf_recaptcha_secret_key');
+
+foreach( $check_keys as $key ){
+    if ( isset($_POST[$key]) && $_POST[$key] ){
+        $_POST[$key] = preg_replace('/[^a-z0-9_\-]/i', '', $_POST[$key]);
+    }
+}
+
 $sql = " update {$g5['config_table']}
             set cf_title = '{$_POST['cf_title']}',
                 cf_admin = '{$_POST['cf_admin']}',