[MyTonCtrl] Add more info

[hacker-volodya]

Where to find additional info:

• https://github.com/ton-blockchain/mytonctrl
• ask @yungwine

1. -m validator, -m liteserver: also -m collator
2. -o, -l: these flags are for remote mytonctrl ([Ecosystem > Node > Remote controller] #1343)
3. More flags were recently added, and each flag now has a --long option. You can check install.sh --help or https://github.com/ton-blockchain/mytonctrl/blob/master/scripts/install.sh
4. ARCHIVE_TTL=864000 sudo bash install.sh -d: remove -d
5. set -1 for effectively permanent retention: this is for internal use between the wizard and mytonctrl, it's best to remove it.