Document how to configure Neutron with iPXE
Document how to configure Neutron with iPXE

In order to use iPXE with neutron we need to create a tag in Neutron,
this patch document how to do it.

Change-Id: I313eb3600e864ff7a868154fe2d0aa6fb8cc69a2

Tan0/ironic,SauloAislan/ironic,openstack/ironic,redhat-openstack/ironic,bacaldwell/ironic,ionutbalutoiu/ironic,bacaldwell/ironic,naterh/ironic,supermari0/ironic,NaohiroTamura/ironic,pshchelo/ironic,devananda/ironic,naototty/vagrant-lxc-ironic,dims/ironic,openstack/ironic,dims/ironic,naototty/vagrant-lxc-ironic,pshchelo/ironic,SauloAislan/ironic,hpproliant/ironic,NaohiroTamura/ironic,ionutbalutoiu/ironic