Disable the usage of proxy protocol by default.

Created by: garloff

If nginx expects inbound connections to use it, this works fine when the connections come from the LB that has been configured to use the proxy protocol. However, talking to ingress directly from the pods does then no longer work (as noone injects the proxy proto then).

This means we should probably not enable it by default.

This should address #184 (closed).

Signed-off-by: Kurt Garloff kurt@garloff.de