Move include/security tp /src/Core/Authentication and /src/Util/Security

mod/cal.php

@@ -21,6 +21,7 @@ use Friendica\Model\Profile;
 use Friendica\Protocol\DFRN;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
+use Friendica\Util\Security;
 
 function cal_init(App $a)
 {
@@ -141,7 +142,7 @@ function cal_content(App $a)
 	}
 
 	// get the permissions
-	$sql_perms = item_permissions_sql($owner_uid, $remote_contact, $groups);
+	$sql_perms = Security::item_permissions_sql($owner_uid, $remote_contact, $groups);
 	// we only want to have the events of the profile owner
 	$sql_extra = " AND `event`.`cid` = 0 " . $sql_perms;