net/storj: add an rc script for storagenode

[jcassette]

This creates a user, folder and rc script to run storagenode as a service.

[jbeich]

Requires review/approval by @danfe (maintainer). Looks like this hasn't been submitted via bugzilla, so cannot land under "maintainer timeout".

[jcassette]

Thanks for the information @jbeich.
Do you suggest that I submit this via Bugzilla?

[danfe]

Do you suggest that I submit this via Bugzilla?

I suggest you maintain the script locally if you find it useful. Storj typically requires careful setup which is different between users. E.g. you mention separate --confir-dir and --identity-dir which are usually kept together, but do not mention locations for metadata (which is often moved to SSD for better speeds) and data (usually resides on a separate storage space).