Secure ReadProperty decoding and BACnetActionCommand (#702)

* Refactored and secured BACnetActionCommand codec into bacaction.c module for command object and added to bacapp module encode/decode with define for enabling and pseudo application tag for internal use.

* Simplified bacapp_data_len() and moved into bacdcode module as bacnet_enclosed_data_len() function.

* Secured ReadProperty-REQUEST and -ACK decoding.

* Removed deprecated Keylist_Key() functions from usage.

* Removed pseudo application datatypes from bacapp_data_decode() which only uses primitive application tag encoded values.

* Defined INT_MAX when it is not already defined by compiler or libc.

* Deprecated bacapp_decode_application_data_len() and bacapp_decode_context_data_len() as they are no longer used in any code in the library.

* Added BACnetScale to bacapp module. Improved complex property value decoding. Refactored bacapp_decode_known_property() function.

* Refactored and improved the bacapp_snprintf() function for printing EPICS.

* Fixed Lighting Output WriteProperty to handle known property decoding.

src/bacnet/bacstr.h

@@ -8,7 +8,6 @@
  */
 #ifndef BACNET_STRING_H
 #define BACNET_STRING_H
-
 #include <stdint.h>
 #include <stdbool.h>
 #include <stddef.h>
@@ -95,15 +94,21 @@ extern "C" {
         uint8_t encoding,
         const char *value,
         size_t length);
-/* used for ANSI C-Strings */
+    /* used for ANSI C-Strings */
     BACNET_STACK_EXPORT
     bool characterstring_init_ansi(
         BACNET_CHARACTER_STRING * char_string,
         const char *value);
+    BACNET_STACK_EXPORT
+    size_t characterstring_strnlen(
+        const char *str, 
+        size_t maxlen);
+    BACNET_STACK_EXPORT
     bool characterstring_init_ansi_safe(
         BACNET_CHARACTER_STRING * char_string,
         const char *value,
         size_t tmax);
+    BACNET_STACK_EXPORT
     bool characterstring_copy(
         BACNET_CHARACTER_STRING * dest,
         BACNET_CHARACTER_STRING * src);
@@ -215,11 +220,6 @@ extern "C" {
         BACNET_OCTET_STRING * octet_string1,
         BACNET_OCTET_STRING * octet_string2);
 
-    BACNET_STACK_EXPORT
-    int bacnet_stricmp(const char *s1, const char *s2);
-    BACNET_STACK_EXPORT
-    size_t bacnet_strnlen(const char *s, size_t maxlen);
-
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */