patch 7.4.2317

Problem:    Normal mode tests fail on MS-Windows.
Solution:   Do some tests only on Unix.  Set 'fileformat' to "unix".

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2317,
 /**/
     2316,
 /**/