[NetRocks] rclone procotol broker

[unxed]

May be implemented as a wrapper around console rclone tool, just as SHELL protocol works.

Only the ClientApp class is reusable - you can reuse it, but this is not too much, the rest essentially needs to be implemented especially for rclone commandline tool. By the way, the first question is - can it output files (downloaded via commandline) to stdout (and upload via stdin) or does everything go straight to the local FS?

Yes, it can. The commands are rclone cat, rclone rcat

#1819 (comment)

@phanex