[pixiv] add support for more URL patterns

- https://www.pixiv.net/mypage.php#id=USERID
- https://www.pixiv.net/#id=USERID

gallery_dl/extractor/pixiv.py

@@ -121,7 +121,8 @@ class PixivUserExtractor(PixivExtractor):
     subcategory = "user"
     pattern = [(r"(?:https?://)?(?:www\.)?pixiv\.net/"
                 r"member(?:_illust)?\.php\?id=(\d+)(?:.*&tag=([^&#]+))?"),
-               (r"(?:https?://)?(?:www\.)?pixiv\.net/u/(\d+)()")]
+               (r"(?:https?://)?(?:www\.)?pixiv\.net/"
+                r"(?:u/|(?:mypage\.php)?#id=)(\d+)()")]
     test = [
         ("http://www.pixiv.net/member_illust.php?id=173530", {
             "url": "852c31ad83b6840bacbce824d85f2a997889efb7",
@@ -134,6 +135,8 @@ class PixivUserExtractor(PixivExtractor):
             "exception": exception.NotFoundError,
         }),
         ("https://www.pixiv.net/u/173530", None),
+        ("https://www.pixiv.net/mypage.php#id=173530", None),
+        ("https://www.pixiv.net/#id=173530", None),
     ]
 
     def __init__(self, match):