[silverpic] force '.net' TLD & fix extraction

docs/supportedsites.md

@@ -2075,7 +2075,7 @@ Consider all listed sites to potentially be NSFW.
 </tr>
 <tr id="silverpic" title="silverpic">
     <td>SilverPic.com</td>
-    <td>https://silverpic.com/</td>
+    <td>https://silverpic.net/</td>
     <td>individual Images</td>
     <td></td>
 </tr>

gallery_dl/extractor/imagehosts.py

@@ -465,14 +465,16 @@ class ImgdriveImageExtractor(ImagehostImageExtractor):
 class SilverpicImageExtractor(ImagehostImageExtractor):
     """Extractor for single images from silverpic.com"""
     category = "silverpic"
-    pattern = (r"(?:https?://)?((?:www\.)?silverpic\.com"
-               r"/([a-z0-9]{10,})/[\S]+\.html)")
-    example = "https://silverpic.com/a1b2c3d4f5g6/NAME.EXT.html"
+    root = "https://silverpic.net"
+    _params = "complex"
+    pattern = (r"(?:https?://)?(?:www\.)?silverpic\.(?:net|com)"
+               r"(/([a-z0-9]{10,})/[\S]+\.html)")
+    example = "https://silverpic.net/a1b2c3d4f5g6/NAME.EXT.html"
 
     def get_info(self, page):
         url, pos = text.extract(page, '<img src="/img/', '"')
         alt, pos = text.extract(page, 'alt="', '"', pos)
-        return f"https://silverpic.com/img/{url}", alt
+        return f"{self.root}/img/{url}", alt
 
     def metadata(self, page):
         pos = page.find('<img src="/img/')

test/results/silverpic.py

@@ -9,10 +9,10 @@ from gallery_dl.extractor import imagehosts
 
 __tests__ = (
 {
-    "#url"     : "https://www.silverpic.com/8k562jyix8xq/jxU_0001.JPG.html",
+    "#url"     : "https://www.silverpic.net/8k562jyix8xq/jxU_0001.JPG.html",
     "#category": ("imagehost", "silverpic", "image"),
     "#class"   : imagehosts.SilverpicImageExtractor,
-    "#results" : "https://silverpic.com/img/z7esmp7eor37ssodt4ptpxbzoy/jxU_0001.JPG",
+    "#results" : "https://silverpic.net/img/z7esmp7eor37ssodt4ptpxbzoy/jxU_0001.JPG",
 
     "filename" : "jxU_0001",
     "extension": "jpg",
@@ -21,4 +21,11 @@ __tests__ = (
     "height"   : 5616,
 },
 
+{
+    "#url"     : "https://www.silverpic.com/8k562jyix8xq/jxU_0001.JPG.html",
+    "#category": ("imagehost", "silverpic", "image"),
+    "#class"   : imagehosts.SilverpicImageExtractor,
+    "#results" : "https://silverpic.net/img/z7esmp7eor37ssodt4ptpxbzoy/jxU_0001.JPG",
+},
+
 )