protected final boolean allowsUnsafeCiphers() {
        return allowsUnsafeCiphers;
    }
Returns whether to allow the bad cipher suites listed in
<a href="https://datatracker.ietf.org/doc/html/rfc7540#appendix-A">RFC7540</a> for TLS handshake.
core/src/main/java/com/linecorp/armeria/common/AbstractTlsConfigBuilder.java