[deviantart] add 'group' option (#3018)

disabling this option allows to better download from deleted accounts

docs/configuration.rst

@@ -1048,6 +1048,17 @@ Description
     Use with caution.
 
 
+extractor.deviantart.group
+--------------------------
+Type
+    ``bool``
+Default
+    ``true``
+Description
+    Check whether the profile name in a given URL
+    belongs to a group or a regular user.
+
+
 extractor.deviantart.include
 ----------------------------
 Type

docs/gallery-dl.conf

@@ -71,10 +71,13 @@
         {
             "client-id": null,
             "client-secret": null,
+            "auto-watch": false,
+            "auto-unwatch": false,
             "comments": false,
             "extra": false,
             "flat": true,
             "folders": false,
+            "group": true,
             "include": "gallery",
             "journals": "html",
             "mature": true,

gallery_dl/extractor/deviantart.py

@@ -72,7 +72,7 @@ class DeviantartExtractor(Extractor):
     def items(self):
         self.api = DeviantartOAuthAPI(self)
 
-        if self.user:
+        if self.user and self.config("group", True):
             profile = self.api.user_profile(self.user)
             self.group = not profile
             if self.group: