vmd send nameserver only once

[Martijn van Duren]

When running vmd with a local interface it sends the nameservers twice, 
which seems a bit redundant to me and always annoys me when editing
resolv.conf manually inside the vm.
Diff below removes one of the two instances.

OK?

martijn@

Index: dhcp.c
===================================================================
RCS file: /cvs/src/usr.sbin/vmd/dhcp.c,v
retrieving revision 1.4
diff -u -p -r1.4 dhcp.c
--- dhcp.c      5 Nov 2017 20:01:09 -0000       1.4
+++ dhcp.c      15 Aug 2018 13:41:24 -0000
@@ -189,11 +189,6 @@ dhcp_request(struct vionet_dev *dev, cha
                o += sizeof(server_addr);
        }
 
-       resp.options[o++] = DHO_DOMAIN_NAME_SERVERS;
-       resp.options[o++] = sizeof(server_addr);
-       memcpy(&resp.options[o], &server_addr, sizeof(server_addr));
-       o += sizeof(server_addr);
-
        resp.options[o++] = DHO_SUBNET_MASK;
        resp.options[o++] = sizeof(mask);
        mask.s_addr = htonl(0xfffffffe);