Server Server r0.1.2

Spec Clarifications

• Change examples to use example.org instead of a real domain.
  (#1650)
• Fix the access_token parameter in the open_id endpoint.
  (#1906)
• Fix various spelling mistakes throughout the specification.
  (#1991)
• Clarify exactly what invite_room_state consists of.
  (#2067)
• Clarify how valid_until_ts behaves with respect to room version.
  (#2080)
• Clarify which servers are supposed to sign events.
  (#2081)
• Clarify the key object definition for the key management API.
  (#2083)
• Clarify how many PDUs are contained in transaction objects for
  various endpoints.
  (#2095)
• Clarify that the trailing slash is optional on /keys/* endpoints
  when no key ID is requested.
  (#2097)