Allow the TFP server or boot server in --pxe-service, to

be a domain name instead of an IP address. This allows for
 round-robin to multiple servers, in the same way as
 --dhcp-boot.

src/dnsmasq.h

@@ -547,7 +547,7 @@ struct dhcp_boot {
 
 struct pxe_service {
   unsigned short CSA, type; 
-  char *menu, *basename;
+  char *menu, *basename, *sname;
   struct in_addr server;
   struct dhcp_netid *netid;
   struct pxe_service *next;