Remove insecure cipher suites

[Golang tls package](https://github.com/golang/go/blob/release-branch.go1.21/src/crypto/tls/cipher_suites.go#L53) lists cipher suites excluding those with security issues. 

We may exclude those insecure cipher suites from [TLSCipherSuitesValues](https://github.com/cesanta/docker_auth/blob/main/auth_server/server/config.go#L94)?