SAM4 Ethernet Driver:  No supports operation using the high priority work queue so that packet processing can occur outside of interrupt level processing.

SAM4E-EK: The nsh configuration now configures the Ethernet driver for execution on the HP work thread.

IOB Configuration:  Default number of IOB changes must be more than zero is UDP read-ahead is enabled.

net/:  Lots of build problems introduced into multiple NIC support.  Many places where conditional logic based on CONFIG_NETDEV_MULTINIC is confused with CONFIG_NET_MULTILINK.  Lots of code changed with IPv6 that was never compiled with MULTINIC enabled.  Still some problem with parameter passing.

mtd/ramtron.c:  Table of parts is not terminated properly if CONFIG_RAMTRON_FRAM_NON_JEDEC is not defined

Big, very risky change:  Remove all occurrences of up_maskack_irq() that disable and enable interrupts with up_ack_irq() that only acknowledges the interrupts.  This is only used in interrupt decoding logic.  Also remove the logic that unconditionally re-enables interrupts with the interrupt exits.  This interferes with the drivers ability to control the interrupt state.  This is a necessary, sweeping, global change and unfortunately impossible to test.

SAMA5D Ethernet:  Add support for CONFIG_NET_NOTINTS so that the driver can operate from the work queue thread instead of doing everything from the interrupt level.

ARMv7-A interrupt handler:  Should not automatically re-enable interrupts on interrupt return.  That interferes with the driver's ability to manage interrupts.

execl():  Fix bad logic in counting the number of arguments.  This could never have worked.  Noted by Pierre-noel Bouteville

Convert all STM32F4-Discovery configurations (with base board) to configure the Ethernet driver to use the work queue (vs. interrupt level processing).

Add logic so that STM32 Ethernet drivier can avoid interrupt level processing and, instead, execute on the work thread.