Fix Archived.moe redirection issue

Unless the board is /b/ (in which case redirection works fine),
remove the characters of the filename portion of the url until
filename portion of the url is 13 characters long (epoch millis).

gallery_dl/extractor/foolfuuka.py

@@ -36,6 +36,13 @@ class FoolfuukaExtractor(BaseExtractor):
             url = media["media_link"]
 
             if not url and "remote_media_link" in media:
+                if "/b/" not in media["remote_media_link"] and \
+                        media["remote_media_link"].startswith("https://archived.moe/"):
+                    filename = media["media"].rpartition(".")[0]
+                    if len(filename) > 13:
+                        filename_remainder = len(filename) - 13
+                        remote_media_link = media["remote_media_link"].replace(filename, filename[:-filename_remainder])
+                        media["remote_media_link"] = remote_media_link
                 url = self.remote(media)
             if url and url[0] == "/":
                 url = self.root + url