Revise cipher suites exposed by Elytron

I know there have been discussed earlier we should revise/update database and defaults regularly.

Checking few ciphersuites from java cipher suite list [1]. I have noticed:

• Elytron is missing CHACHA20 variants introduced in rfc 7905
• missing ciphersuites from RFC 6209
• ...

Please revise content of MechanismDatabase.properties

[1] https://docs.oracle.com/javase/10/docs/specs/security/standard-names.html#jsse-cipher-suite-names