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.

SYSLOG: Add an option to use the syslog'ing device as the system consolution.  This option enables a low-level, write-only console device at /dev/console (similar to the low-level UART console device).  From Pierre-noel Bouteville.

STM32 SPI:  The source clock for SPI 4,5, and 6 should be PCLK2, not PCLK1 (for F411, F427, and F429).  Per David Sidrane.