Keep terminator alive until receiving all downs
Keep terminator alive until receiving all downs

Storing a reference to itself makes sure that the terminator never gets
killed by CAF when becoming unreachable. This is necessary, because
monitors only store weak references.

mavam/vast,vast-io/vast,vast-io/vast,mavam/vast,mavam/vast,vast-io/vast,vast-io/vast,mavam/vast,vast-io/vast