Conflicts:
	configs/nucleo-l476rg/src/stm32_spi.c (resolved)

realloc(): When realloc() has to fall back to calling malloc(), size including overhead was being provided to malloc(), causing a slightly larger allocation than needed.  Noted by initialkjc@yahoo.com

add module init wrappers

pthread mutexes:  Add option to support both unsafe and robust mutexes via pthread_mutexattr_get/setrobust().

pthreads:  Add a configuration option to disable robust mutexes and revert to the traditional unsafe mutexes.