The problem/use-case that the feature addresses

Currently replication is not working with right Public Key Infrastructure (in my case with Subordinate CA) because the config file does not have any option to specify the client certificate and key.

Description of the feature

An option to specify the client certificate and the client key (tls-client-cert-file and tls-client-key-file).

Additional information

Without it, the sentinel changes the Redis instance between master and replica and fails to connect without the client certificate/key (that acts as a client certificate, not server certificate).

Note: This issue is strictly related to the DNS inssue: #7928.
For two way TLS authentication, valid domain name is needed. (SAN field in X509.v3)