Add support for DHCP on tinycore

plugins/guests/tinycore/cap/configure_networks.rb

@@ -7,6 +7,11 @@ module VagrantPlugins
         def self.configure_networks(machine, networks)
           machine.communicate.tap do |comm|
             networks.each do |n|
+              if n[:type] == :dhcp
+                comm.sudo("/sbin/udhcpc -b -i eth#{n[:interface]} -p /var/run/udhcpc.eth#{n[:interface]}.pid")
+                return
+              end
+
               ifc = "/sbin/ifconfig eth#{n[:interface]}"
               broadcast = (IPAddr.new(n[:ip]) | (~ IPAddr.new(n[:netmask]))).to_s
               comm.sudo("#{ifc} down")