[PATCH rtems-lwip v1 0/8] NTP library support

[Kinsey Moore]

This patch set cleans up the lwIP source imports, switches rtems-lwip
over to using the tools headers for network structures, and brings in
Sebastian Huber's work on the NTP client for rtems-libbsd along with the
support necessary to compile it. I have verified the the BBB BSP still
compiles.

This patch set can also be found here:
https://github.com/KinseyMoore/rtems-lwip/tree/ntp