Added Program object task state transitions from request and callbacks (#960)

src/bacnet/bacenum.h

@@ -1094,7 +1094,8 @@ typedef enum BACnetProgramRequest {
     PROGRAM_REQUEST_RUN = 2,
     PROGRAM_REQUEST_HALT = 3,
     PROGRAM_REQUEST_RESTART = 4,
-    PROGRAM_REQUEST_UNLOAD = 5
+    PROGRAM_REQUEST_UNLOAD = 5,
+    PROGRAM_REQUEST_MAX = 6
 } BACNET_PROGRAM_REQUEST;
 
 typedef enum BACnetProgramState {
@@ -1103,7 +1104,8 @@ typedef enum BACnetProgramState {
     PROGRAM_STATE_RUNNING = 2,
     PROGRAM_STATE_WAITING = 3,
     PROGRAM_STATE_HALTED = 4,
-    PROGRAM_STATE_UNLOADING = 5
+    PROGRAM_STATE_UNLOADING = 5,
+    PROGRAM_STATE_MAX = 6
 } BACNET_PROGRAM_STATE;
 
 typedef enum BACnetProgramError {