[FEATURE] - Mutiple peers with failover

[mpk995]

Is your feature request related to a problem? Please describe.
It is not a problem but it would be a great feature to solve real-life problems

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
If my primary server goes down, I need to go manually and connect to my backup server

Describe the solution you'd like
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Now that we have restart on ping failure working, it will be great to have multiple peers on same interface in failover or loadbalance mode. If 1st peer ping fails, traffic should go through 2nd peer

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.
I am currently using mutliple interfaces and if primary is not working, I turn auto-tunnel off and connect to backup endpoint. Both endpoints have same public/private keys but different endpoint
Additional context
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