Bugfix/win32 build warnings (#936)

* Changed win32 port of localtime to use secure OS API functions when compiled with MSVC

* Changed all the sprintf to use snprintf instead in BSC tests to ensure null string endings.

test/bacnet/datalink/websockets/src/main.c

@@ -8143,8 +8143,8 @@ static void test_simple(void)
     memset(&srv_ctx, 0, sizeof(srv_ctx));
     srv_ctx.ev = -1;
     srv_ctx.h = BSC_WEBSOCKET_INVALID_HANDLE;
-    sprintf(
-        url, "wss://%s:%d", BACNET_WEBSOCKET_SERVER_ADDR,
+    snprintf(
+        url, sizeof(url), "wss://%s:%d", BACNET_WEBSOCKET_SERVER_ADDR,
         BACNET_WEBSOCKET_SERVER_PORT);
 
     ret = bws_srv_start(
@@ -8211,10 +8211,9 @@ static void test_onoff(void)
     memset(&srv_ctx, 0, sizeof(srv_ctx));
     srv_ctx.ev = -1;
     srv_ctx.h = BSC_WEBSOCKET_INVALID_HANDLE;
-    sprintf(
-        url, "wss://%s:%d", BACNET_WEBSOCKET_SERVER_ADDR,
+    snprintf(
+        url, sizeof(url), "wss://%s:%d", BACNET_WEBSOCKET_SERVER_ADDR,
         BACNET_WEBSOCKET_SERVER_PORT);
-
     ret = bws_srv_start(
         BSC_WEBSOCKET_HUB_PROTOCOL, BACNET_WEBSOCKET_SERVER_PORT, NULL, ca_cert,
         sizeof(ca_cert), server_cert, sizeof(server_cert), server_key,