Detect if server uses XEP-0004: Data Forms for registration
Detect if a server uses XEP-0004: Data Forms for registration. (e.g., not all clients support that, but they may want to use providers list). This information would allow them to filter this list.
From https://pad.nixnet.services/oy6MKVbESSycLeMJIOh6zw?view=#Lightning-Talk-XMPP-Providers
Edited by Daniel Brötzmann