What do I see?

If I specify a single protocol, the configuration is parsed without error. However, if I specify multiple, then the parsing always fails with a generic error.

What do I expect to see?

The valid combinations of TLS protocol versions should be accepted.

Environment

Ubuntu bionic
Latest stable Redis code, built from source

Steps to reproduce

Single value accepted
tls-protocols TLSv1.2

Multiple values fail
tls-protocols TLSv1.2 TLSv1.3

error in log
Invalid tls-protocols specified. Use a combination of 'TLSv1', 'TLSv1.1', 'TLSv1.2' and 'TLSv1.3'.