Update nt installation instructions to point to supported method

* nt/INSTALL: Rename from INSTALL.MSYS.

* nt/INSTALL.OLD: Rename from INSTALL.

* nt/configure.bat: Update for INSTALL name changes.

* make-dist: Update for nt/INSTALL* changes.

ChangeLog

+2013-08-31  Glenn Morris  <rgm@gnu.org>
+
+	* make-dist: Update for nt/INSTALL* changes.
+
 2013-08-28  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* Makefile.in (SHELL): Now @SHELL@, not /bin/sh,

etc/NEWS

@@ -762,12 +762,10 @@ meant to be used by other packages.
 
 * Changes in Emacs 24.4 on Non-Free Operating Systems
 
-** Emacs for MS-Windows can now be built by running the configure script
-using the MSYS environment and MinGW development tools.
-This is from now on the preferred method of building Emacs on
-MS-Windows.  The Windows-specific configure.bat and makefile.w32-in
-files are deprecated.  See the file nt/INSTALL.MSYS for detailed
-instructions.
+** The procedure for building Emacs on MS-Windows has changed.
+It is now built by running the same configure script as on all other
+platforms.  This requires the MSYS environment and MinGW development
+tools.  See the updated instructions in nt/INSTALL for details.
 
 Using the Posix configure script and Makefile's also means a change in
 the directory structure of the Emacs installation on Windows.  It is

make-dist

@@ -404,7 +404,7 @@ echo "Making links to \`nt'"
  ln config.nt emacsclient.rc emacs-src.tags ../${tempdir}/nt
  ln nmake.defs gmake.defs subdirs.el [a-z]*.bat [a-z]*.[ch] ../${tempdir}/nt
  ln Makefile.in gnulib.mk ../${tempdir}/nt
- ln msysconfig.sh mingw-cfg.site epaths.nt INSTALL.MSYS ../${tempdir}/nt
+ ln msysconfig.sh mingw-cfg.site epaths.nt INSTALL.OLD ../${tempdir}/nt
  ln ChangeLog INSTALL README README.W32 makefile.w32-in ../${tempdir}/nt)
 
 echo "Making links to \`nt/inc' and its subdirectories"

nt/ChangeLog

+2013-08-31  Glenn Morris  <rgm@gnu.org>
+
+	* INSTALL: Rename from INSTALL.MSYS.
+	* INSTALL.OLD: Rename from INSTALL.
+	* configure.bat: Update for INSTALL name changes.
+
 2013-08-25  Vincent Belaïche  <vincentb1@users.sourceforge.net>
 
 	* configure.bat: Rather than disabling, make configure.bat produce

nt/configure.bat

@@ -60,7 +60,7 @@ rem [8] tested only on Windows XP.
 rem
 echo ****************************************************************
 echo *** THIS METHOD OF BUILDING EMACS IS NO LONGER SUPPORTED.     **
-echo *** INSTEAD, FOLLOW THE INSTRUCTIONS FROM INSTALL.MSYS.       **
+echo *** INSTEAD, FOLLOW THE INSTRUCTIONS FROM INSTALL.            **
 echo ****************************************************************
 :confirm_continue
 set /p answer=Continue running this script at your own risks ? (Y/N)
@@ -191,7 +191,7 @@ echo.
 echo. IMPORTANT: This method of building Emacs for MS-Windows is deprecated,
 echo. and could be removed in a future version of Emacs.  The preferred way
 echo  to build Emacs for MS-Windows from now on is using the MSYS environment
-echo. and MinGW development tools.  Please see nt/INSTALL.MSYS for details.
+echo. and MinGW development tools.  Please see nt/INSTALL for details.
 goto end
 
 rem ----------------------------------------------------------------------