[shimmie2] add generic extractors for Shimmie2 sites (#3734)

add support for
- loudbooru.com       (#3734)
- booru.cavemanon.xyz (#3734)
- giantessbooru.com   (#943)
- tentaclerape.net

docs/supportedsites.md

@@ -541,12 +541,6 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Albums, Channels</td>
     <td>Supported</td>
 </tr>
-<tr>
-    <td>meme.museum</td>
-    <td>https://meme.museum/</td>
-    <td>Posts, Tag Searches</td>
-    <td></td>
-</tr>
 <tr>
     <td>My Hentai Gallery</td>
     <td>https://myhentaigallery.com/</td>
@@ -1266,6 +1260,40 @@ Consider all sites to be NSFW unless otherwise known.
     <td></td>
 </tr>
 
+<tr>
+    <td colspan="4"><strong>Shimmie2 Instances</strong></td>
+</tr>
+<tr>
+    <td>meme.museum</td>
+    <td>https://meme.museum/</td>
+    <td>Posts, Tag Searches</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Loudbooru</td>
+    <td>https://loudbooru.com/</td>
+    <td>Posts, Tag Searches</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Giantessbooru</td>
+    <td>https://giantessbooru.com/</td>
+    <td>Posts, Tag Searches</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Tentaclerape</td>
+    <td>https://tentaclerape.net/</td>
+    <td>Posts, Tag Searches</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Cavemanon</td>
+    <td>https://booru.cavemanon.xyz/</td>
+    <td>Posts, Tag Searches</td>
+    <td></td>
+</tr>
+
 <tr>
     <td colspan="4"><strong>szurubooru Instances</strong></td>
 </tr>

gallery_dl/extractor/__init__.py

@@ -94,7 +94,6 @@
     "mangapark",
     "mangasee",
     "mangoxo",
-    "mememuseum",
     "misskey",
     "myhentaigallery",
     "myportfolio",
@@ -134,6 +133,7 @@
     "seiga",
     "senmanga",
     "sexcom",
+    "shimmie2",
     "simplyhentai",
     "skeb",
     "slickpic",

gallery_dl/extractor/paheal.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2018-2022 Mike Fährmann
+# Copyright 2018-2023 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -14,7 +14,7 @@
 
 class PahealExtractor(Extractor):
     """Base class for paheal extractors"""
-    basecategory = "booru"
+    basecategory = "shimmie2"
     category = "paheal"
     filename_fmt = "{category}_{id}_{md5}.{extension}"
     archive_fmt = "{id}"