SCP: Add missing aspects to sim_filepath_parts, move sim_dir_scan to sim_fio

sim_fio.h

@@ -72,6 +72,13 @@ t_offset sim_fsize_name_ex (const char *fname);
 t_stat sim_copyfile (const char *source_file, const char *dest_file, t_bool overwrite_existing);
 char *sim_filepath_parts (const char *pathname, const char *parts);
 char *sim_getcwd (char *buf, size_t buf_size);
+#include <sys/stat.h>
+typedef void (*DIR_ENTRY_CALLBACK)(const char *directory, 
+                                   const char *filename,
+                                   t_offset FileSize,
+                                   const struct stat *filestat,
+                                   void *context);
+t_stat sim_dir_scan (const char *cptr, DIR_ENTRY_CALLBACK entry, void *context);
 
 void sim_buf_swap_data (void *bptr, size_t size, size_t count);
 void sim_buf_copy_swapped (void *dptr, const void *bptr, size_t size, size_t count);