Sorry, but thats not going to happen.
However, as of 4.2.3 a couple of new options were added to the core to help in this case.
Code:
/* Enter your known proxy servers here. You can list multiple trusted IPs separated by a comma.
You can also use the * wildcard (at the end of a definition only) or use the keyword 'all' to represent any ip address.*/
//$config['Misc']['proxyiplist'] = '127.0.0.1, 192.168.*, all';
Also, in 4.2.4 an extra fix was added due to PHP sometimes not passing the custom headers into the $_SERVER array (which stopped the system working).