title: Read acl white listed IP from a file on Haproxy
body: <p> I was trying to load the whitelist IP to Haproxy acl from file</p>
  
  <p> I was able to whitelist ip via adding inline to haproxy config file  and its works well </p>
  
  <p>I was wondering is there any way that i can specify the ip address to a file and read it from haproxy configuration </p> 
  
  <p>Here is my Haproxy conf  </p>
  
  <pre><code>global
          log /dev/log    local0
          log /dev/log    local1 notice
          chroot /var/lib/haproxy
          user haproxy
          group haproxy
          daemon
  
  defaults
          log     global
          mode    http
          option  httplog
          option  dontlognull
          contimeout 5000
          clitimeout 50000
          srvtimeout 50000
          errorfile 400 /etc/haproxy/errors/400.http
          errorfile 403 /etc/haproxy/errors/403.http
          errorfile 408 /etc/haproxy/errors/408.http
          errorfile 500 /etc/haproxy/errors/500.http
          errorfile 502 /etc/haproxy/errors/502.http
          errorfile 503 /etc/haproxy/errors/503.http
          errorfile 504 /etc/haproxy/errors/504.http
  
  frontend http-in
      bind *:80
      mode http
      reqadd X-Forwarded-Proto:\ http
      acl whitelist src 192.168.12.32 192.168.0.1
      acl all src 0.0.0.0
  
      acl demo hdr_end(host)  -i 192.168.20.26
      use_backend demo if demo whitelist
  
  backend demo
      balance leastconn
      option httpclose
      option forwardfor
      cookie JSESSIONID prefix
      server locahost localhost:8080 cookie A check
  </code></pre>