Module discovery

Server discovery endpoints.

Modules

• discover_homeserver
  GET /.well-known/matrix/client (spec)
• discover_support
  GET /.well-known/matrix/support (spec)
• get_authentication_issuer
  GET /_matrix/client/*/auth_issuer
• get_capabilities
  GET /_matrix/client/*/capabilities
• get_supported_versions
  GET /_matrix/client/versions (spec)