compare long file names in case-insensitive mode,
the bug had been introduced in r3418

src/os/win32/ngx_files.c

diff --git a/src/os/win32/ngx_files.c b/src/os/win32/ngx_files.c
index 518da5a..a6350ce 100644
--- a/src/os/win32/ngx_files.c
+++ b/src/os/win32/ngx_files.c
@@ -48,7 +48,7 @@
             goto failed;
         }
 
-        if (n != len - 1 || ngx_memcmp(u, lu, n) != 0) {
+        if (n != len - 1 || _wcsicmp(u, lu) != 0) {
             ngx_set_errno(NGX_ENOENT);
             goto failed;
         }

src/os/win32/ngx_win32_config.h

diff --git a/src/os/win32/ngx_win32_config.h b/src/os/win32/ngx_win32_config.h
index d35b448..0dcba98 100644
--- a/src/os/win32/ngx_win32_config.h
+++ b/src/os/win32/ngx_win32_config.h
@@ -36,6 +36,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <locale.h>
 
 #ifdef __WATCOMC__
 #define _TIME_T_DEFINED

src/os/win32/ngx_win32_init.c

diff --git a/src/os/win32/ngx_win32_init.c b/src/os/win32/ngx_win32_init.c
index 0924c3c..3b22358 100644
--- a/src/os/win32/ngx_win32_init.c
+++ b/src/os/win32/ngx_win32_init.c
@@ -114,6 +114,9 @@
 
     for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ }
 
+    /* delete default "C" locale for _wcsicmp() */
+    setlocale(LC_ALL, "");
+
 
     /* init Winsock */