Call kore_connection_disconnect() when draining connections.
Call kore_connection_disconnect() when draining connections.

This way the disconnect callbacks are called properly when
workers are exiting.

hhua/kore,korusdipl/kore,bonifaido/kore,bonifaido/kore,bonifaido/kore,hhua/kore,jorisvink/kore,hhua/kore,sinemetu1/kore,zhcy/kore,jorisvink/kore,fourdollars/kore