[zzup] support 'w.zzup.com' URLs

- zzup.py support for w.zzup
- fix pattern
- update tests

gallery_dl/extractor/zzup.py

@@ -16,7 +16,7 @@ class ZzupGalleryExtractor(GalleryExtractor):
     filename_fmt = "{num:>03}.{extension}"
     archive_fmt = "{slug}_{num}"
     root = "https://zzup.com"
-    pattern = (r"(?:https?://)?(up\.|www\.)?zzup\.com(/(?:viewalbum|content)"
+    pattern = (r"(?:https?://)?(up\.|w+\.)?zzup\.com(/(?:viewalbum|content)"
                r"/[\w=]+/([^/?#]+)/[\w=]+)/(?:index|page-\d+)\.html")
     example = "https://zzup.com/content/xyz=/12345_TITLE/123=/index.html"