fixed dhcp search domains

isc-dhcp/dhcpd.conf

@@ -54,7 +54,7 @@ subnet DHCP_SUBNET netmask DHCP_NETMASK {
 
   # DNS settings
   option domain-name "DHCP_SITE_DOMAIN";
-  option domain-search "DHCP_SITE_DOMAIN DHCP_DOMAIN";
+  option domain-search "DHCP_SITE_DOMAIN", "DHCP_DOMAIN";
   option domain-name-servers DHCP_DNS_SERVER;
 
   # Push custom routes to clients