Issue #23883: Add missing APIs to __all__; patch by Jacek KoƂodziej
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index c416d85..2afa19d 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -42,7 +42,8 @@
 import warnings
 from socket import _GLOBAL_DEFAULT_TIMEOUT
 
-__all__ = ["FTP"]
+__all__ = ["FTP", "error_reply", "error_temp", "error_perm", "error_proto",
+           "all_errors"]
 
 # Magic number from <socket.h>
 MSG_OOB = 0x1                           # Process data out of band