Fix previous

Arguably the want_protocol entries in various of these tests are incorrect
but I'll leave that for another day.

Adjust tls regress for protocol parsing fixes

This mostly reverts what was done by beck in Tallinn and adjust tlstest
to add new test cases and now failing connection tests.

Remove the ability to do tls 1.0 and 1.1 from libtls.

With this change any requests from configurations to request
versions of tls before tls 1.2 will use tls 1.2. This prepares
us to deprecate tls

Remove the ability to do tls 1.0 and 1.1 from libtls.

With this change any requests from configurations to request
versions of tls before tls 1.2 will use tls 1.2. This prepares
us to deprecate tls 1.0 and tls 1.1 support from libssl.

ok tb@

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Update libtls config regress to include TLSv1.3.

Add a regress test for tls_config_parse_protocols().