Removed remaining kernel imports from ip lib.
Removed unneeded precomp.h from drivers/lib/ip.
Removed some memtrack and other spew.
Removed datagram send pipe part, and accompanying address file queue.
Simplified send pipe (major changes):
- Neighbor is solely responsible for firing normal ip datagrams to the peer.
- Transmit is the only place normal ip datagrams are passed to neighbor from.
- Simplified fragmentation code.
- Made callbacks explicit and always called in neighbor and transmit.
- Clarified ownership of transmitted NdisPacket.
- Ditto IPPackets here and in icmp.
- PC(Packet)->DLComplete is *only* used by lan.c and loopback.c
- Simplified loopback send mechanism
Added the beginnings of a test suite
svn path=/trunk/; revision=11582