Can't link to PDF from outside foundry/forge.

[Belgaron]

Describe the bug
You can't link to a URL because it automatically seems to be filling in a URL of its own before the one you enter

To Reproduce
Steps to reproduce the behavior:

1. Go to 'PDF url'
2. Enter the url
3. Open the file or "test settings"
4. See error - Message: Missing PDF "https://manastream.forge-vtt.com/https://dl.dropbox.com/s/atapw7r5jlfpgc0/Pathfinder%20RPG%20-%20Core%20Rulebook%20%286th%20Printing%29.pdf".

Expected behavior
I should enter the URL to my pdf and it should go there... it should not add https://manastream.forge-vtt.com/ before my url

Screenshots
Here is the entire error entry.

PDF.js v2.13.16 (build: 2f5be5f21)
Message: Missing PDF "https://manastream.forge-vtt.com/https://dl.dropbox.com/s/atapw7r5jlfpgc0/Pathfinder%20RPG%20-%20Core%20Rulebook%20%286th%20Printing%29.pdf".

Version Information:

• Browser [Chrome]
• FoundryVTT [9.269]
• PDFoundry [v2.13.16 (build: 2fbe5f21)]
• Activated Systems & Modules w/ Versions too many to list, but happens with none

Additional context
Freaking love this module, but there are file size limits to what I can upload in forge so I'm trying to host the pdf myself. I do this for all images and audio files and it works flawlessly.

Thank you for this module.