Mytonctrl update

TON has a very convenient tool for installing and maintaining a node or a validator.

Just take a server with the recommended hardware requirements and run one script.

The mytonctrl tool received a big update c83a3a:

New functionality
— Quick installation mode using dump download.
— Nominator pool support is now in the master branch with new improvements.
— Validators can now issue certificates for liteservers.

Improved work with wallets
— Added support for different wallet versions (v1, v2, v3) and wallet version detecting.
— Import & export wallet by address and private key.
— Now no restart is required to apply changes to wallets.

Stats improvement
— More info in the status command and more accurate calculation of indicators — e.g., TPS.
— Display of past elections, validators, and complaints.
— Improved telemetry (disks iops, network pps, uname, memory, swap).

Misc
— Refactoring.
— Miner removed.

Thank you to igroman787, the permanent maintainer of mytonctrl.