Update proxy documentation to correspond to new ccxt mode

docs/configuration.md

@@ -682,16 +682,14 @@ To use a proxy for exchange connections - you will have to define the proxies as
 { 
   "exchange": {
     "ccxt_config": {
-      "aiohttp_proxy": "http://addr:port",
-      "proxies": {
-        "http": "http://addr:port",
-        "https": "http://addr:port"
-      },
+      "httpsProxy": "http://addr:port",
     }
   }
 }
 ```
 
+For more information on available proxy types, please consult the [ccxt proxy documentation](https://docs.ccxt.com/#/README?id=proxy).
+
 ## Next step
 
 Now you have configured your config.json, the next step is to [start your bot](bot-usage.md).

tests/exchange/test_ccxt_compat.py

@@ -293,11 +293,7 @@ def set_test_proxy(config: Config, use_proxy: bool) -> Config:
     if use_proxy and (proxy := os.environ.get('CI_WEB_PROXY')):
         config1 = deepcopy(config)
         config1['exchange']['ccxt_config'] = {
-            "aiohttp_proxy": proxy,
-            'proxies': {
-                'https': proxy,
-                'http': proxy,
-            }
+            "httpsProxy": proxy,
         }
         return config1