Fix SSL issue in latest Indy versions by setting PassThrough to False

[iadcode]

In late-2019, Indy changed the default value of TIdSSLIOHandlerSocketBase.PassThrough to True. As a consequence, DelphiRedisClient with UseSSL will still send unencrypted traffic if used with the latest Indy.

See:

• https://github.com/IndySockets/Indy/commit/d54269ed3817e4d29023673aa3d78781ac826465
• https://community.idera.com/developer-tools/data-internet-and-web-services/f/internet-clients/72775/how-to-fix-delphi-10-4-problem-with-indy-tidtcpclient-and-encrypted-connections

[danieleteti]

thank you