* Updating the license from MPL to Business Source License
Going forward, this project will be licensed under the Business Source License v1.1. Please see our blog post for more details at https://hashi.co/bsl-blog, FAQ at https://hashi.co/license-faq, and details of the license at www.hashicorp.com/bsl.
* Update copyright file headers to BUSL-1.1
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Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
* add sshkey.Generate function that returns an sshkey.Pair to be used with openssh.
* add cmd/ssh-keygen/main.go for testing purposes
* add a test calling ssh.ParsePrivateKey & ssh.ParseAuthorizedKey (which is very
similar to what openssh would do to read a keypair)
The wrapping of the keys should be handled by crypto/x509.MarshalPKCS8PrivateKey
& x/crypto/ssh.NewPublicKey which does not work for ed25519 and dsa.
x509.MarshalPKCS8PrivateKey marshals ed25519 keys but the keys did not work with openssh.
x509.MarshalPKCS8PrivateKey does not handle dsa keys.
So I had to 'wrap' those manually by reading the code of the openssh package.
Note that ssh.NewPublicKey works with any keytype. I should probably do a PR to ssh to have a NewPrivateKey & Marshalling funcs
