Devin O'Daniel

Hello, I stumbled across this when using your `EncodePublicKey()` function with a rsa.PrivateKey generated with the `"crypto/rsa"` package using `rsa.GenerateKey(rand.Reader, 4096)`. The Public Key that was created using your function...

I was able to bypass the need for your convenience function by using the `"golang.org/x/crypto/ssh"` package to create the Public Key. For reference for others: https://gist.github.com/devinodaniel/8f9b8a4f31573f428f29ec0e884e6673

:) If I get some time this week or next, I can try to take a stab at implementation unless you think you might get there sooner.

I had some luck with minimizing duplicate notifications by tweaking the `--cluster.pushpull-interval` and `--cluster.gossip-interval` [flags](https://github.com/prometheus/alertmanager#high-availability) in the alertmanager startup command to values other than the default. I started with defaults...