DevMgr: Add DeviceReattacher daemon plumbing

This is the plumbing for a periodic polling thread that tries
to reattach DA specs that failed to attach in the startup phase.

CMakeLists.txt

@@ -24,6 +24,14 @@ if(NOT MIND_VOSCILLATOR_PERIOD_MS GREATER 0)
 endif()
 math(EXPR MIND_VOSCILLATOR_FREQ_MS "1000 / ${MIND_VOSCILLATOR_PERIOD_MS}")
 
+# Device manager reattacher configuration
+set(MRNTT_DEVMGR_REATTACHER_PERIOD_MS 1500
+	CACHE STRING "Device manager reattacher period (ms)")
+if(NOT MRNTT_DEVMGR_REATTACHER_PERIOD_MS GREATER 0)
+    message(FATAL_ERROR
+		"MRNTT_DEVMGR_REATTACHER_PERIOD_MS must be a positive integer > 0")
+endif()
+
 # World thread configuration
 option(WORLD_USE_BODY_THREAD
 	"Use body thread for world component instead of separate world thread" OFF)