add Waystream iBOS model

[lowinger42]

Pre-Request Checklist

• Passes rubocop code analysis (try rubocop --auto-correct)
• Tests added or adapted (try rake test)
• Changes are reflected in the documentation
• User-visible changes appended to CHANGELOG.md

Description

add support for Waystream products, with their iBOS operating system
This has been in production at customer site for over one year, doing backup on approx 1400 devices.

[wk]

Looks good, thanks for bringing this in!

[lowinger42]

Thanks for merging!