scripts/dhclient.conf

   1 option proxy-auto-config code 252 = text;
   2 request subnet-mask, broadcast-address, routers, host-name,
   3         domain-search, domain-name, domain-name-servers,
   4         time-offset, time-servers, ntp-servers, interface-mtu,
   5         proxy-auto-config;
   6 require subnet-mask, domain-name-servers;