Allow polling avatar from URI

Feature
2

The code already appears to exist for Discourse

but more importantly, this is implemented elsewhere, and Gravatar and Libravatar explicitly support it well.

For instance, here’s a document I made about Libravatar’s support

https://gitlab.com/-/snippets/2590066/raw/main/s0s2gl.txt.md

  1. APIs

    email = ''.encode('utf-8')
hash = hashlib.md5(email.strip().lower()).hexdigest()
print(hash)

  2. Examples