also disable argparse's auto-added help in the (io)nice parameters check (#3052)

sabnzbd/cfg.py

@@ -73,7 +73,7 @@ class ErrorCatchingArgumentParser(argparse.ArgumentParser):
 def clean_nice_ionice_parameters(value: str) -> ValidateResult:
     """Verify that the passed parameters are not exploits"""
     if value:
-        parser = ErrorCatchingArgumentParser()
+        parser = ErrorCatchingArgumentParser(add_help=False)
 
         # Nice parameters
         parser.add_argument("-n", "--adjustment", type=int)

tests/test_cfg.py

@@ -88,6 +88,10 @@ class TestValidators:
         assert_blocked("echo 'how;now;brown;cow'")
         assert_blocked("-c'echo'")
         assert_blocked("--classdata=;/bin/echo")
+        assert_blocked("-h")
+        assert_blocked("--help")
+        assert_blocked("-h -c1")
+        assert_blocked("-c1 --help")
 
     @pytest.mark.parametrize(
         "setting, is_correct_win, is_correct_unix",