Added FTP\Connection class

Author: weirdan

stubs/Php81.phpstub

@@ -1,6 +1,11 @@
 <?php
+namespace {
+    interface UnitEnum {
+        /** @return non-empty-list<static> */
+        public static function cases(): array;
+    }
+}
 
-interface UnitEnum {
-    /** @return non-empty-list<static> */
-    public static function cases(): array;
+namespace FTP {
+    final class Connection {}
 }