patch 9.1.1029: the installer can be improved

Problem:  the installer can be improved
Solution: update the installer with the correct README and LICENSE
          files, improve the documentation, add a Makefile for the
          installer, update the Makefiles (RestorerZ)

fixes: #16378
closes: #16378

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/nsis/gvim_version.nsh b/nsis/gvim_version.nsh
index aee434b..c59366a 100644
--- a/nsis/gvim_version.nsh
+++ b/nsis/gvim_version.nsh
@@ -3,4 +3,5 @@
 !define __GVIM_VER__NSH__
 !define VER_MAJOR 9
 !define VER_MINOR 1
+!define PATCHLEVEL 0
 !endif