[xfolio] add initial support (#5514, #6351, #6837)

docs/configuration.rst

@@ -401,6 +401,7 @@ Default
         ``urlgalleries``,
         ``vk``,
         ``weebcentral``,
+        ``xfolio``,
         ``zerochan``
     * ``"1.0-2.0"``
         ``flickr``,

docs/gallery-dl.conf

@@ -702,6 +702,10 @@
         {
             "sleep-request": "0.5-1.5"
         },
+        "xfolio":
+        {
+            "sleep-request": "0.5-1.5"
+        },
         "weibo":
         {
             "sleep-request": "1.0-2.0",
@@ -923,7 +927,7 @@
             "config-file"    : null,
             "enabled"        : true,
             "format"         : null,
-            "forward-cookies": false,
+            "forward-cookies": true,
             "logging"        : true,
             "module"         : null,
             "outtmpl"        : null,

docs/supportedsites.md

@@ -1081,6 +1081,12 @@ Consider all listed sites to potentially be NSFW.
     <td>Galleries</td>
     <td></td>
 </tr>
+<tr>
+    <td>Xfolio</td>
+    <td>https://xfolio.jp/</td>
+    <td>Series, User Profiles, Works</td>
+    <td></td>
+</tr>
 <tr>
     <td>xHamster</td>
     <td>https://xhamster.com/</td>