allow comments and trailing commas in config files

freqtrade/configuration/load_config.py

@@ -1,7 +1,7 @@
 """
 This module contain functions to load the configuration file
 """
-import json
+import rapidjson
 import logging
 import sys
 from typing import Any, Dict
@@ -12,6 +12,9 @@ from freqtrade import OperationalException
 logger = logging.getLogger(__name__)
 
 
+CONFIG_PARSE_MODE = rapidjson.PM_COMMENTS | rapidjson.PM_TRAILING_COMMAS
+
+
 def load_config_file(path: str) -> Dict[str, Any]:
     """
     Loads a config file from the given path
@@ -21,7 +24,7 @@ def load_config_file(path: str) -> Dict[str, Any]:
     try:
         # Read config from stdin if requested in the options
         with open(path) if path != '-' else sys.stdin as file:
-            config = json.load(file)
+            config = rapidjson.load(file, parse_mode=CONFIG_PARSE_MODE)
     except FileNotFoundError:
         raise OperationalException(
             f'Config file "{path}" not found!'