Win32: removed NGX_DIR_MASK concept. Previous interface of ngx_open_dir() assumed that passed directory name has a room for NGX_DIR_MASK at the end (NGX_DIR_MASK_LEN bytes). While all direct users of ngx_dir_open() followed this interface, this also implied similar requirements for indirect uses - in particular, via ngx_walk_tree(). Currently none of ngx_walk_tree() uses provides appropriate space, and fixing this does not look like a right way to go. Instead, ngx_dir_open() interface was changed to not require any additional space and use appropriate allocations instead.

--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -213,9 +213,6 @@ void ngx_close_file_mapping(ngx_file_map
 #endif
 
 
-#define NGX_DIR_MASK_LEN         0
-
-
 ngx_int_t ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir);
 #define ngx_open_dir_n           "opendir()"