add a few more examples to gallery-dl-example.conf

- include 'igneous' and 'hath_perks' in Exhentai cookies
- add an example of how to write DeviantArt description to file
- add a 'path-restrict' mapping from invalid characters in Windows
  paths to Unicode alternatives (taken from #662)

docs/gallery-dl-example.conf

@@ -48,7 +48,9 @@
             "cookies":
             {
                 "ipb_member_id": "12345",
-                "ipb_pass_hash": "1234567890abcdef"
+                "ipb_pass_hash": "1234567890abcdef",
+                "igneous"      : "123456789",
+                "hath_perks"   : "m1.m2.m3.a-123456789a"
             },
 
             "proxy":
@@ -74,6 +76,19 @@
             }]
         },
 
+        "deviantart":
+        {
+            "include": "gallery,scraps",
+            "metadata": true,
+            "postprocessors": [{
+                "name": "metadata",
+                "mode": "custom",
+                "directory"       : "Descriptions",
+                "content-format"  : "{description}\n",
+                "extension-format": "descr.txt"
+            }]
+        },
+
         "flickr":
         {
             "access-token": "1234567890-abcdef",
@@ -134,6 +149,19 @@
         "foolfuuka": {
             "fireden-onion": {"root": "http://ydt6jy2ng3s3xg2e.onion"},
             "scalearchive":  {"root": "https://archive.scaled.team"  }
+        },
+
+        "replace invalid path characters with unicode alternatives": null,
+        "path-restrict": {
+            "\\": "⧹",
+            "/" : "⧸",
+            "|" : "￨",
+            ":" : "꞉",
+            "*" : "∗",
+            "?" : "？",
+            "\"": "″",
+            "<" : "﹤",
+            ">" : "﹥"
         }
     },