Second phase of address cache refactoring:

1. Added time to live functionality
2. Added option of partial cache init on reset to reduce traffic for controllers that can preserve RAM over power cycle/reset.
3. Can now put new entries in the cache even if it is full - entry nearest to expiry is dropped to make room.

bacnet-stack/include/address.h

@@ -46,6 +46,9 @@ extern "C" {
     void address_init(
         void);
 
+    void address_init_partial(
+        void);
+    
     void address_add(
         uint32_t device_id,
         unsigned max_apdu,
@@ -90,6 +93,14 @@ extern "C" {
         uint8_t * apdu,
         unsigned apdu_len);
         
+    void address_set_device_TTL(
+        uint32_t device_id,
+        uint32_t TimeOut,
+        bool     StaticFlag);
+        
+    void address_cache_timer(
+        uint16_t uSeconds);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */