Add configuration for bonds on interfaces

[usamaahmadkhan]

Bonding is a very typical scenario in production systems.
Bond configurations can be passed similarly to ip configurations as described in the docs here: bonding configurations

For both:

• masters
• workers
  For bootstrap node it doesn't make any sense.

Happy to open a PR if this issue gets accepted.

[christianh814]

Yeah, if you have a bond you want to set up, that makes sense to want to configure the helpernode with that.

I would just make it a conditional. As long as you keep the default setup and people can opt in for bonding, I'm all for it