Adds support for TLS 1.3 in Telnet.
Features
- Support for TLS 1.3 in Telnet - Telnet class features support for telnet over TLS 1.3.
- TLS/SSL: Added support for ALPN TLS extension to TlsSocket.
- TLS/SSL: Added TlsBulkCipherMode.AEAD (to replace TlsBulkCipherMode.GCM).
- TLS/SSL: Removed support for two legacy unsecure anonymous ciphers (DH_anon_EXPORT_WITH_DES40_CBC_SHA and DH_anon_EXPORT_WITH_RC4_40_MD5).
- Cryptography: Added PkcsBase.LoadSignedOrEnvelopedData method (a replacement for deprecated PkcsBase.Load).