20180622
* Add two-step synchronisation aka "follow-up" message support to PTP grandmaster
  (requires software 2.2.0 or later for configuration)

20171206
* Enable PCIe RX equalization to improve PCIe link performance/stability
* Add support for PXE boot (legacy BIOS only, no UEFI support currently)
* Add support for reloading firmware after flashing without requiring host reboot
* Fix bug where PPS timestamp could be read incorrectly
* Filter PPS input: Only latch PPS edges which are preceded by a period where PPS
  input is unasserted

20170728
* Fall back to passive mode if a better master is detected (BMC algorithm)
* Support antenna cable delay compensation
* Fix PTP sequence numbering to meet specification
* Fix for lost packets at 100M link speed
* Improve Flash programming settings to address occasional programming failure
* Fix bug where the host could lock up if a 1G link was disconnected/interrupted
  during the middle of receiving a frame
* Add support for local loopback of port traffic back to host
* 1G autoneg enable status is now read back from the card correctly

20160823
* Initial prod release