Redis TLS support

[studix]

In #1025 it is mentioned that TLS is not supported for memcache. Is this also true for redis?

I configured the OIDCCache to a Redis Cache with TLS enabled and I'm getting the following error:

"Redis command (attempt=1 to myproxy:6380) failed, disconnection: 'Resource temporarily unavailable'"

With the non-TLS port it works.

[zandbelt]

support for Redis over TLS is only available in commercially licensed builds of mod_auth_openidc, see also: https://github.com/OpenIDC/mod_auth_openidc/wiki/Caching#redisvalkey-tls--redisvalkey-cluster-tls--redisvalkey-sentinel-tls