Upgrade priority: Medium (timely upgrade recommended) - due to change(s): Update to latest sysinfo prevents leaking fd-handlers (paritytech/substrate#6708) Graceful shutdown for the task manager (paritytech/substrate#6654) Update libp2p to 0.22. (paritytech/substrate#6690)

Specs of the runtime can be found here: https://github.com/paritytech/polkadot/releases/tag/v0.8.19 

:
1. Upgrade priority: Medium (timely upgrade recommended) 
2. Change(s): Update to latest sysinfo prevents leaking fd-handlers (paritytech/substrate#6708), Graceful shutdown for the task manager (paritytech/substrate#6654), Update libp2p to 0.22 (paritytech/substrate#6690). 
3. Specification of the runtime is available in specific link.

#49 SetCode, Kusama runtime 2019

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