Topic: [Feature] MD5 hash field in upload form

Requested feature overview description.
Add in text field in upload form for MD5 hash. If the uploads hash does not match the one provided in the field, upload is prevented.

Why would it be useful?
With large files, this would prevent uploads that are corrupted during the upload. This also lessens steps when uploading large files as now you do not need to compared the MD5 of the upload to local copy after the upload.

Additionally, upload form could check if post with stated MD5 already exsists and notify the uploader.

What part(s) of the site page(s) are affected?
Upload form.
Uploading.

Updated