'real_ip_header proxy_protocol' don't change the client address

[fengx]

I have the setting as follow:

real_ip_header   proxy_protocol;
real_ip_recursive on;
set_real_ip_from  192.168.1.0/24;

For example, when I send request to nginx from 10.0.0.1, 
$proxy_protocol_addr prints 10.0.0.1, which is the original client, but
$remote_addr prints 192.168.1.1 which is our proxy.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,276542,276543#msg-276543