Name: session-reset-request
Type: request
Purpose: >
  Declare session as closed and check-out all remaining badges
Response: session-reset-confirmation
Inherits: message
Elements:
  Signature: { required: true }
  From: { required: true }
  Event-Id: { required: true, type: identifier, class: event }
  Session-Id: { type: string, min_length: 3, max_length: 32 }
Notes: >
  If Session-Id element is missing, the first session in the event's
  active_session list is reset.
Rejection-Codes:
  22: Event does not exist
  23: No session specified
  31: Sender is not authorized to reset sessions