follow bpo-37324: :ref:`collections-abstract-base-classes` moved to the :mod:`collections.abc` module

(since 3.10-alpha.5 `MutableMapping` is missing in collections module)

fail2ban/server/action.py

@@ -30,7 +30,10 @@ import tempfile
 import threading
 import time
 from abc import ABCMeta
-from collections import MutableMapping
+try:
+	from collections.abc import MutableMapping
+except ImportError:
+	from collections import MutableMapping
 
 from .failregex import mapTag2Opt
 from .ipdns import DNSUtils