security/openssl111 TLSv1.3 port options

[Koichiro Iwao]

Hi,

OpenSSL 1.1.1 has been added to ports tree. AFAIK OpenSSL 1.1.1 supports 
TLSv1.3
but no port options for TLSv1.3. There're only TLS1, TLS1_1, TLS1_2.

I assume TLSv1.3 will be enabled by default unless disabled explicitly 
so
security/openssl111 will always be built with TLSv1.3 enabled, am I 
correct?
And why not add port options to enable/disable TLSv1.3 as well as older 
TLS versions?

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