Update add_parser_arguments comment

letsencrypt/plugins/common.py

@@ -45,15 +45,14 @@ class Plugin(object):
     def add_parser_arguments(cls, add):
         """Add plugin arguments to the CLI argument parser.
 
+        NOTE: If some of your flags interact with others, you can
+        use cli.report_config_interaction to register this to ensure
+        values are correctly saved/overridable during renewal.
+
         :param callable add: Function that proxies calls to
             `argparse.ArgumentParser.add_argument` prepending options
             with unique plugin name prefix.
 
-        NOTE: if you add argpase arguments such that users setting them can
-        create a config entry that python's bool() would consider false (ie,
-        the use might set the variable to "", [], 0, etc), please ensure that
-        cli.set_by_cli() works for your variable.
-
         """
 
     @classmethod