SSLOptions: Add modern options
SSLOptions: Add modern options

Summary:
SSLCommonOptions and SSLServerOptions contain ciphers that modern
clients/servers should not be using.

This diff introduces `SSLOptions2021`, containing an updated recommended list of
ciphers and signature algorithms. It renames the old versions into `SSLOptionsCompatibility`
and `SSLServerOptionsCompatibility` and type aliases `SSLOptions` and `SSLServerOptions`
respectively.

At some point in the future (pending rollouts) SSLOptions and SSLServerOptions
will point to the updated versions.

Reviewed By: yfeldblum

Differential Revision: D32969347

fbshipit-source-id: 887572b2037f8eec07a62dbbce10a9ee7a9f4db6

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly