Inform users about configuration file and directory includes

This patch makes it clearer to users what settings Tor daemon
is actually using. I think it is pretty important.

src/lib/encoding/confline.c

@@ -148,6 +148,9 @@ config_get_lines_aux(const char *string, config_line_t **result, int extended,
           tor_free(v);
           return -1;
         }
+        log_notice(LD_CONFIG, "Included configuration file or "
+                   "directory at recursion level %d: \"%s\".",
+                   recursion_level, v);
         *next = include_list;
         if (list_last)
           next = &list_last->next;