[Scribe] Clean up old I/O threads before reconnecting
[Scribe] Clean up old I/O threads before reconnecting

Requires websocket-server af6029df8ec98b0678a9fd50a923ded32b7c550e.

CylonicRaider/Instant,CylonicRaider/Instant,CylonicRaider/Instant,CylonicRaider/Instant,CylonicRaider/Instant