95nfs/nfs-lib.sh: add server-ip to nfs server search

modules.d/95nfs/nfs-lib.sh

@@ -95,6 +95,7 @@ nfsroot_from_dhcp() {
     done
     [ -n "$new_root_path" ] && nfsroot_to_var "$nfs:$new_root_path"
     [ -z "$path" ] && [ "$(getarg root=)" == "/dev/nfs" ] && path=/tftpboot/%s
+    [ -z "$server" ] && server=$srv
     [ -z "$server" ] && server=$new_dhcp_server_identifier
     [ -z "$server" ] && server=$new_dhcp_next_server
     [ -z "$server" ] && server=${new_root_path%%:*}