[reddit] increase 'id-max' default value (#3397)

to float("inf")

docs/gallery-dl.conf

@@ -251,8 +251,8 @@
             "date-min": 0,
             "date-max": 253402210800,
             "date-format": "%Y-%m-%dT%H:%M:%S",
-            "id-min": "0",
-            "id-max": "zik0zj",
+            "id-min": null,
+            "id-max": null,
             "recursion": 0,
             "videos": true
         },

gallery_dl/extractor/reddit.py

@@ -428,7 +428,7 @@ class RedditAPI():
 
     def _pagination(self, endpoint, params):
         id_min = self._parse_id("id-min", 0)
-        id_max = self._parse_id("id-max", 2147483647)
+        id_max = self._parse_id("id-max", float("inf"))
         date_min, date_max = self.extractor._get_date_min_max(0, 253402210800)
 
         while True: