Implement distro-sync command

[mcurlej]

Command: distro-sync
Aliases: dsync
Deprecated aliases: distrosync, distribution-synchronization

dnf distro-sync [<package-spec>...]

As necessary upgrades, downgrades or keeps selected installed packages to match the latest version available from any enabled repository. If no package is given, all installed packages are considered.

See also Configuration Files Replacement Policy.

• Implement distor-sync command

Separated issues from the main task:

• Deprecated aliase distorsync, distribution-synchronization - implement or document dropping #638

• • Shell we drop them or keep them as compatible alias?
• • Proposing to drop them
• • priority low

• Alias dsync - implement #639

• • Shell we drop it or keep it as compatible alias?
• • Proposing to keep it
• • priority low