Separate net/net_send_buffered.c and net/net_send_unbuffered.c to net/tcp/tcp_send_buffered.c, net/tcp/tcp_send_unbuffered.c, and pkt/pkt_send.c
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Net PKT: Suppress ARP requests for packet socket transfers
Net PKT: Suppress ARP requests for packet socket transfers
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Move include/nuttx/net/uipopt.h to include/nuttx/net/netconfig.h
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Contents of iob.h should not be compiled if CONFIG_NET_IOB is not set
Move include/nuttx/net/uip/uip-arch.h to include/nuttx/net/netdev.h
Move the remaining files from include/nuttx/net/uip to include/nuttx/net; Rename *_internal.h header files in net/ to just *.h
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Add throttle support to the I/O buffer logic
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TCP Read-Ahead:  Convert to use I/O buffer chains
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Forget to add a file in last commit
Clean up all TCP-related naming
Clean up all UDP-related naming
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Add support for the SAM4CM.  From Max Neklyudov