[reddit] use REST API by default (#8559)

docs/configuration.rst

@@ -4984,7 +4984,7 @@ extractor.reddit.api
 Type
     ``string``
 Default
-    ``"oauth"``
+    ``"rest"``
 Description
     Selects which API endpoints to use.
 

docs/gallery-dl.conf

@@ -672,11 +672,12 @@
         },
         "reddit":
         {
+            "cookies"      : null,
             "client-id"    : null,
             "user-agent"   : null,
             "refresh-token": null,
 
-            "api"         : "oauth",
+            "api"         : "rest",
             "comments"    : 0,
             "morecomments": false,
             "embeds"      : true,

gallery_dl/extractor/reddit.py

@@ -394,7 +394,7 @@ class RedditAPI():
         self.morecomments = config("morecomments", False)
         self._warn_429 = False
 
-        if config("api") == "rest":
+        if config("api") != "oauth":
             self.root = "https://www.reddit.com"
             self.headers = None
             self.authenticate = util.noop