Force SSL redirection to target service host for all protocols

[siva.pannier]

Hi.. 

> An you want your clients to talk to nginx without encryption, and for
> nginx to talk to upstream with encryption.

Yup this is what I am trying to achieve. Started testing on these scenarios.
Will you keep you all posted on the results.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,288541,288663#msg-288663