Large Segment Offload Support for Intel PCI Express 10Gb NIC Driver

This feature introduces Large Segment Offload (LSO) support for the ixgbe driver and some ixgbe driver bug fixes. LSO is an important feature for NIC, especially for 10-Gb NIC. LSO can offload the segmentation job on Layer 4 to the NIC driver. LSO improves transmit performance by decreasing CPU overhead. This feature is enabled by default.