### Description of problem:

"ProxyAddHeaders Off" does not become effective when it's defined outside <Proxy> setting. X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server http headers are still passed to the backend server.

~~~ 
ProxyPass / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/
ProxyAddHeaders Off 

<Proxy "*">
   Require all granted
   # ...(any other config)...
</Proxy>
~~~


### Version-Release number of selected component (if applicable):

httpd-2.4.6-45.el7.x86_64


### How reproducible:

Anytime


### Steps to Reproduce:

1. Configure the above proxy config in Apache httpd
2. Start Apache httpd and backend server
3. Send http request 
4. See if X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers are passed to the backend server


### Actual results:

X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers are still passed to the backend server.


### Expected results:

X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers does not exist in the forwarded request header to the backend server.


### Additional info:

Workaround exists. When moving "ProxyAddHeaders Off" inside <Proxy> setting, it works like a charm:

~~~ 
ProxyPass / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/

<Proxy "*">
   ProxyAddHeaders Off 
   Require all granted
   # ...(any other config)...
</Proxy>
~~~