router: Allow creating a new client pointing to a specific address.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
controller: Aggregate drain events from all routers.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
test: Time out the pause command in a few seconds.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
cli, controller: Refactor drain stream to be a long-running http request.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
sse: Trim trailing newline from the received data.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>