Add option to ignore chapter URLs

[HDoujinDownloader]

For many websites, HDoujin Downloader supports both manga and chapter URLs.

It's possible to accidentally add chapter URLs instead of manga URLs. A user has requested that chapter URLs are skipped in the event the manga they are a part of has already been added to the download queue.

Hi there, thanks for sharing this program.
I wanna ask, can this program skip the chapter page url?

For example, sometimes i will submit the urls contains both manga, and one chapter of manga, i want the program to remove the chapter url automaticly.

We could have an option to skip chapter URLs if the manga has already been added to the download queue, as well as always skipping them altogether.