Fixing documentation for PXE master node booting
Fixing documentation for PXE master node booting

Change-Id: I098a09b9583c0591154d28ee94f8342a35a97f65

huntxu/fuel-web,huntxu/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,koder-ua/nailgun-fcert,huntxu/fuel-web,koder-ua/nailgun-fcert,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,nebril/fuel-web,stackforge/fuel-web,stackforge/fuel-web,zhaochao/fuel-web,prmtl/fuel-web,nebril/fuel-web,huntxu/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,koder-ua/nailgun-fcert,SmartInfrastructures/fuel-web-dev,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,eayunstack/fuel-web,prmtl/fuel-web,zhaochao/fuel-web,stackforge/fuel-web,zhaochao/fuel-web,nebril/fuel-web,eayunstack/fuel-web,koder-ua/nailgun-fcert,prmtl/fuel-web,zhaochao/fuel-web,nebril/fuel-web,zhaochao/fuel-web,eayunstack/fuel-web