patch 9.1.0750: there are some Win9x legacy references

Problem:  there are some Win9x legacy references
Solution: Remove those mentions (Nir Lichtman)

closes: #15730

Signed-off-by: Nir Lichtman <nir@lichtman.org>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/os_win32.c

@@ -12,7 +12,7 @@
  * Used for both the console version and the Win32 GUI.  A lot of code is for
  * the console version only, so there is a lot of "#ifndef FEAT_GUI_MSWIN".
  *
- * Win32 (Windows NT and Windows 95) system-dependent routines.
+ * Win32 system-dependent routines.
  * Portions lifted from the Win32 SDK samples, the MSDOS-dependent code,
  * NetHack 3.1.3, GNU Emacs 19.30, and Vile 5.5.
  *
@@ -7572,19 +7572,9 @@ mch_total_mem(int special UNUSED)
 
 /*
  * mch_wrename() works around a bug in rename (aka MoveFile) in
- * Windows 95: rename("foo.bar", "foo.bar~") will generate a
- * file whose short file name is "FOO.BAR" (its long file name will
- * be correct: "foo.bar~").  Because a file can be accessed by
- * either its SFN or its LFN, "foo.bar" has effectively been
- * renamed to "foo.bar", which is not at all what was wanted.  This
- * seems to happen only when renaming files with three-character
- * extensions by appending a suffix that does not include ".".
- * Windows NT gets it right, however, with an SFN of "FOO~1.BAR".
- *
- * There is another problem, which isn't really a bug but isn't right either:
+ * Windows, the bug can be demonstrated with the following scenario:
  * When renaming "abcdef~1.txt" to "abcdef~1.txt~", the short name can be
- * "abcdef~1.txt" again.  This has been reported on Windows NT 4.0 with
- * service pack 6.  Doesn't seem to happen on Windows 98.
+ * "abcdef~1.txt" again.
  *
  * Like rename(), returns 0 upon success, non-zero upon failure.
  * Should probably set errno appropriately when errors occur.

src/os_win32.h

@@ -7,7 +7,7 @@
  */
 
 /*
- * Win32 (Windows NT and Windows 95) machine-dependent things.
+ * Win32 machine-dependent things.
  */
 
 #include "os_dos.h"		// common MS-DOS and Win32 stuff

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    750,
 /**/
     749,
 /**/