net_sendfile:  Let the ACK callback handle the REXMIT flag and don't return until all data has been ACK'd. From Max Holtzberg

Move tcp connection into SYN_RCVD state after aception instead of bypassing and moving directly into ESTABLISHED.  From Max Holtzberg.

Changed the meaning of the uip_*input functions. They now return success when a packet is dropped; This is needed for the ENCX24J600 driver that must make a decision to return the packet or not:  It should not retain dropped packets. From Max Holtzberg

Notify the socket layer if a connection is lost before the monitoring callback has been registered.  From Max Holtzberg

Make net_close() nonblocking and free unestablished connections if no free connections available.  From Max Holtzberg

Another case where we should use the routing table: There may be multiple routers on the same network.  In that case, we have to search for the routing table for the router that forwards to the destination address.  We do this when we determine the MAC address we want in the ARP logic

Fix ordering of operations in network ioctl handling.  We need to able to distinguish an error because the command was not recognized vs. other kinds of error

netdev_findbyaddr() will not use a routing table if one is available.  It will also make a better decision in the case there there is no routing table but only a single network interface.

Networking:  Fix backward conditional in test to see if address is in ARP table.  From Max Holtzberg

Networking: If sending out of the subnet, device lookup by IP will fail.  Fall back to ETH0 for now.  From Max Holtzberg

Networking:  Important bug fix.  The backlog buffer pointer was not being incrmented so that only the first backlog buffer was getting added to the freelist.  From Max Holtzberg

Networking:  Fix race condition that can cause missing loss-of-connection events.  From Max Holtzberg