[Mono.Security]: Add a few more 'Mono.Security.Interface' APIs.
The following general-purpose enums and exception helpers were moved
here from Mono.Security.NewTls.Interface, which is going away.
* Alert, CipherAlgorithmType, CipherSuiteCode, ExchangeAlgorithmType,
HashAlgorithmType, TlsConnectionInfo, TlsException, TlsProtocolCode,
TlsProtocols.
* TlsConnectionInfo has been merged into MonoTlsConnectionInfo.
Note that you may not use 'using' statements for both 'Mono.Security.Interface'
and 'System.Security.Authentication' due to conflicting types. Use a prefix such as
"using MSI = Mono.Security.Interface;" or "using SSA = System.Security.Authentication;"
if you need both namespaces.
(cherry picked from commit
af05134433c658c93f82c6f4d47b93bb4b83257f)