doc: Remove refs to dos(16|32), win16, and win95

This is primarily low-hanging fruit; there are still many references to
things such as MS-DOS throughout (see os_dos.txt).

9 files changed, 16 insertions, 164 deletions

diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index e1c84d37a6..f5e4bd8d9d 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -6722,8 +6722,6 @@ dialog_con		Compiled with console dialog support.
 dialog_gui		Compiled with GUI dialog support.
 digraphs		Compiled with support for digraphs.
 dnd			Compiled with support for the "~ register |quote_~|.
-dos16			16 bits DOS version of Vim.
-dos32			32 bits DOS (DJGPP) version of Vim.
 eval			Compiled with expression evaluation support.  Always
 			true, of course!
 ex_extra		Compiled with extra Ex commands |+ex_extra|.
@@ -6824,12 +6822,10 @@ visualextra		Compiled with extra Visual mode commands.
 vreplace		Compiled with |gR| and |gr| commands.
 wildignore		Compiled with 'wildignore' option.
 wildmenu		Compiled with 'wildmenu' option.
-win16			Win16 version of Vim (MS-Windows 3.1).
 win32			Win32 version of Vim (MS-Windows 95 and later, 32 or
 			64 bits)
 win32unix		Win32 version of Vim, using Unix files (Cygwin)
 win64			Win64 version of Vim (MS-Windows 64 bit).
-win95			Win32 version for MS-Windows 95/98/ME.
 winaltkeys		Compiled with 'winaltkeys' option.
 windows			Compiled with support for more than one window.
 writebackup		Compiled with 'writebackup' default on.
diff --git a/runtime/doc/gui_w32.txt b/runtime/doc/gui_w32.txt
index 9449347259..8132d47cf1 100644
--- a/runtime/doc/gui_w32.txt
+++ b/runtime/doc/gui_w32.txt
@@ -262,12 +262,6 @@ WARNING: If you close this window with the "X" button, and confirm the
 question if you really want to kill the application, Vim may be killed too!
 (This does not apply to commands run asynchronously with ":!start".)
 
-In Windows 95, the window in which the commands are executed is always 25x80
-characters, to be as DOS compatible as possible (this matters!).  The default
-system font is used.  On NT, the window will be the default you have set up for
-"Console" in Control Panel.  On Win32s, the properties of the DOS box are
-determined by _default.pif in the windows directory.
-
 							*msdos-mode*
 If you get a dialog that says "This program is set to run in MS-DOS mode..."
 when you run an external program, you can solve this by changing the
diff --git a/runtime/doc/help.txt b/runtime/doc/help.txt
index 45d135a84d..e1c05365f7 100644
--- a/runtime/doc/help.txt
+++ b/runtime/doc/help.txt
@@ -162,7 +162,7 @@ Versions ~
 Remarks about specific systems ~
 |os_mac.txt|	Macintosh
 |os_unix.txt|	Unix
-|os_win32.txt|	MS-Windows 95/98/NT
+|os_win32.txt|	MS-Windows
 						*standard-plugin-list*
 Standard plugins ~
 |pi_getscript.txt| Downloading latest version of Vim scripts
diff --git a/runtime/doc/if_cscop.txt b/runtime/doc/if_cscop.txt
index 5f13d4d176..4f8c0e2065 100644
--- a/runtime/doc/if_cscop.txt
+++ b/runtime/doc/if_cscop.txt
@@ -360,9 +360,6 @@ cscope version for Win32 see:
 
 	http://iamphet.nm.ru/cscope/index.html
 
-The DJGPP-built version from http://cscope.sourceforge.net is known to not
-work with Vim.
-
 Hard-coded limitation: doing a |:tjump| when |:cstag| searches the tag files
 is not configurable (e.g., you can't do a tselect instead).
 
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index b6ce83825a..6c184a5a59 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -5461,17 +5461,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	"-f" is not inside the quotes, because it is not part of the command
 	name.  And Vim automagically recognizes the backslashes that are path
 	separators.
-	For Dos 32 bits (DJGPP), you can set the $DJSYSFLAGS environment
-	variable to change the way external commands are executed.  See the
-	libc.inf file of DJGPP.
-	Under MS-Windows, when the executable ends in ".com" it must be
-	included.  Thus setting the shell to "command.com" or "4dos.com"
-	works, but "command" and "4dos" do not work for all commands (e.g.,
-	filtering).
-	For unknown reasons, when using "4dos.com" the current directory is
-	changed to "C:\".  To avoid this set 'shell' like this: >
-		:set shell=command.com\ /c\ 4dos
-<	This option cannot be set from a |modeline| or in the |sandbox|, for
+	This option cannot be set from a |modeline| or in the |sandbox|, for
 	security reasons.
 
 						*'shellcmdflag'* *'shcf'*
diff --git a/runtime/doc/os_dos.txt b/runtime/doc/os_dos.txt
index 03170cf1d8..1c80f4d7a5 100644
--- a/runtime/doc/os_dos.txt
+++ b/runtime/doc/os_dos.txt
@@ -87,15 +87,15 @@ key		key code     Normal/Visual mode	    Insert mode ~
 CTRL-PageUp	<M-N><M-C-D>	    H		    <C-O>H
 CTRL-PageDown	<M-N>v		    L$		    <C-O>L<C-O>$
 
-Additionally, these keys are available for copy/cut/paste.  In the Win32
-and DJGPP versions, they also use the clipboard.
+Additionally, these keys are available for copy/cut/paste.
+In the Win32 version, they also use the clipboard.
 
 Shift-Insert	paste text (from clipboard)			*<S-Insert>*
 CTRL-Insert	copy Visual text (to clipboard)			*<C-Insert>*
 CTRL-Del	cut Visual text (to clipboard)			*<C-Del>*
 Shift-Del	cut Visual text (to clipboard)			*<S-Del>*
 
-These mappings accomplish this (Win32 and DJGPP versions of Vim):
+These mappings accomplish this (Win32 version of Vim):
 
 key		key code     Normal	Visual	    Insert ~
 Shift-Insert	<M-N><M-T>   "*P	"-d"*P      <C-R><C-O>*
@@ -276,18 +276,14 @@ If you are running a third-party shell, you may need to set the
 |'shellcmdflag'| ('shcf') and |'shellquote'| ('shq') or |'shellxquote'|
 ('sxq') options.  Unfortunately, this also depends on the version of Vim used.
 For example, with the MKS Korn shell or with bash, the values of the options
-should be:
+on Win32 should be:
 
-		DOS 16 bit	    DOS 32 bit		Win32  ~
-'shellcmdflag'	   -c			-c		 -c
-'shellquote'	   "
-'shellxquote'						 "
+'shellcmdflag'	-c
+'shellquote'	(empty)
+'shellxquote'	"
 
-For Dos 16 bit this starts the shell as:
-	<shell> -c "command name" >file
-For Win32 as:
+For Win32, this starts the shell as:
 	<shell> -c "command name >file"
-For DOS 32 bit, DJGPP does this internally somehow.
 
 When starting up, Vim checks for the presence of "sh" anywhere in the 'shell'
 option.  If it is present, Vim sets the 'shellcmdflag' and 'shellquote' or
diff --git a/runtime/doc/os_win32.txt b/runtime/doc/os_win32.txt
index a2ee0e1255..603dbcddce 100644
--- a/runtime/doc/os_win32.txt
+++ b/runtime/doc/os_win32.txt
@@ -7,8 +7,8 @@
 						*win32* *Win32* *MS-Windows*
 This file documents the idiosyncrasies of the Win32 version of Vim.
 
-The Win32 version of Vim works on Windows NT, 95, 98, ME, XP, Vista and
-Windows 7.  There are both console and GUI versions.
+The Win32 version of Vim works on Windows NT, XP, Vista and Windows 7.
+There are both console and GUI versions.
 
 The 32 bit version also runs on 64 bit MS-Windows systems.
 
@@ -37,23 +37,8 @@ The Win32 version was written by George V. Reilly <george@reilly.org>.
 The original Windows NT port was done by Roger Knobbe <RogerK@wonderware.com>.
 The GUI version was made by George V. Reilly and Robert Webb.
 
-For compiling see "src/INSTALLpc.txt".			*win32-compiling*
-
 ==============================================================================
-1. Known problems				*windows95* *win32-problems*
-
-There are a few known problems with running in a console on Windows 95.  As
-far as we know, this is the same in Windows 98 and Windows ME.
-
-Comments from somebody working at Microsoft: "Win95 console support has always
-been and will always be flaky".
-1.  Dead key support doesn't work.
-2.  Resizing the window with ":set columns=nn lines=nn" works, but executing
-    external commands MAY CAUSE THE SYSTEM TO HANG OR CRASH.
-3.  Screen updating is slow, unless you change 'columns' or 'lines' to a
-    non-DOS value.  But then the second problem applies!
-
-If this bothers you, use the 32 bit MS-DOS version or the Win32 GUI version.
+1. Known problems					*win32-problems*
 
 When doing file name completion, Vim also finds matches for the short file
 name.  But Vim will still find and use the corresponding long file name.  For
@@ -143,99 +128,12 @@ running under Win32s the following differences apply:
 ==============================================================================
 6. Win32 mini FAQ					*win32-faq*
 
-Q. Why does the Win32 version of Vim update the screen so slowly on Windows 95?
-A. The support for Win32 console mode applications is very buggy in Win95.
-   For some unknown reason, the screen updates very slowly when Vim is run at
-   one of the standard resolutions (80x25, 80x43, or 80x50) and the 16-bit DOS
-   version updates the screen much more quickly than the Win32 version.
-   However, if the screen is set to some other resolution, such as by ":set
-   columns=100" or ":set lines=40", screen updating becomes about as fast as
-   it is with the 16-bit version.
-
-   WARNING: Changing 'columns' may make Windows 95 crash while updating the
-   window (complaints --> Microsoft).  Since this mostly works, this has not
-   been disabled, but be careful with changing 'columns'.
-
-   Changing the screen resolution makes updates faster, but it brings
-   additional problems.  External commands (e.g., ":!dir") can cause Vim to
-   freeze when the screen is set to a non-standard resolution, particularly
-   when 'columns' is not equal to 80.  It is not possible for Vim to reliably
-   set the screen resolution back to the value it had upon startup before
-   running external commands, so if you change the number of 'lines' or
-   'columns', be very, very careful.  In fact, Vim will not allow you to
-   execute external commands when 'columns' is not equal to 80, because it is
-   so likely to freeze up afterwards.
-
-   None of the above applies on Windows NT.  Screen updates are fast, no
-   matter how many 'lines' or 'columns' the window has, and external commands
-   do not cause Vim to freeze.
-
-Q. So if the Win32 version updates the screen so slowly on Windows 95 and the
-   16-bit DOS version updates the screen quickly, why would I want to run the
-   Win32 version?
-A. Firstly, the Win32 version isn't that slow, especially when the screen is
-   set to some non-standard number of 'lines' or 'columns'.  Secondly, the
-   16-bit DOS version has some severe limitations: It can't do big changes and
-   it doesn't know about long file names.  The Win32 version doesn't have these
-   limitations and it's faster overall (the same is true for the 32-bit DJGPP
-   DOS version of Vim).  The Win32 version is smarter about handling the
-   screen, the mouse, and the keyboard than the DJGPP version is.
-
-Q. And what about the 16-bit DOS version versus the Win32 version on NT?
-A. There are no good reasons to run the 16-bit DOS version on NT.  The Win32
-   version updates the screen just as fast as the 16-bit version does when
-   running on NT.  All of the above disadvantages apply.  Finally, DOS
-   applications can take a long time to start up and will run more slowly.  On
-   non-Intel NT platforms, the DOS version is almost unusably slow, because it
-   runs on top of an 80x86 emulator.
-
 Q. How do I change the font?
 A. In the GUI version, you can use the 'guifont' option.  Example: >
 	:set guifont=Lucida_Console:h15:cDEFAULT
 <  In the console version, you need to set the font of the console itself.
    You cannot do this from within Vim.
 
-Q. When I change the size of the console window with ':set lines=xx' or
-   similar, the font changes! (Win95)
-A. You have the console font set to 'Auto' in Vim's (or your MS-DOS prompt's)
-   properties.  This makes W95 guess (badly!) what font is best.  Set an explicit
-   font instead.
-
-Q. Why can't I paste into Vim when running Windows 95?
-A. In the properties dialog box for the MS-DOS window, go to "MS-DOS
-   Prompt/Misc/Fast pasting" and make sure that it is NOT checked.  You should
-   also do ":set paste" in Vim to avoid unexpected effects.	|'paste'|
-
-Q. How do I type dead keys on Windows 95, in the console version?
-   (A dead key is an accent key, such as acute, grave, or umlaut, that doesn't
-   produce a character by itself, but when followed by another key, produces
-   an accented character, such as a-acute, e-grave, u-umlaut, n-tilde, and so
-   on.  Very useful for most European languages.  English-language keyboard
-   layouts don't use dead keys, as far as we know.)
-A. You don't.  The console mode input routines simply do not work correctly in
-   Windows 95, and I have not been able to work around them.  In the words
-   of a senior developer at Microsoft:
-	Win95 console support has always been and will always be flaky.
-
-	The flakiness is unavoidable because we are stuck between the world of
-	MS-DOS keyboard TSRs like KEYB (which wants to cook the data;
-	important for international) and the world of Win32.
-
-	So keys that don't "exist" in MS-DOS land (like dead keys) have a
-	very tenuous existence in Win32 console land.  Keys that act
-	differently between MS-DOS land and Win32 console land (like
-	capslock) will act flaky.
-
-	Don't even _mention_ the problems with multiple language keyboard
-	layouts...
-
-   You may be able to fashion some sort of workaround with the digraphs
-   mechanism.							|digraphs|
-
-   The best solution is to use the Win32 GUI version gvim.exe.  Alternatively,
-   you can try one of the DOS versions of Vim where dead keys reportedly do
-   work.
-
 Q. How do I type dead keys on Windows NT?
 A. Dead keys work on NT 3.51.  Just type them as you would in any other
    application.
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 62cd199afd..db9d652499 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1519,8 +1519,6 @@ patches by Mathias, see mail Feb 22)
 Win32: compiling with normal features and OLE fails.  Patch by Mathias
 Michaelis, 2006 Jun 4.
 
-Win16: include patches to make Win16 version work. (Vince Negri, 2006 May 22)
-
 Win32: after "[I" showing matches, scroll wheel messes up screen. (Tsakiridis,
 2007 Feb 18)
 Patch by Alex Dobrynin, 2007 Jun 3.  Also fixes other scroll wheel problems.
@@ -2088,14 +2086,6 @@ MSDOS and Win32:
     backslashes. (Ronald Hoellwarth)
 
 
-Windows 95:
-8   Editing a file by its short file name and writing it, makes the long file
-    name disappear.  Setting 'backupcopy' helps.
-    Use FindFirstFile()->cAlternateFileName in fname_case() (George Reilly).
-8   Doing wildcard expansion, will match the short filename, but result in the
-    long filename (both DJGPP and Win32).
-
-
 Win32 console:
 9   When editing a file by its short file name, it should be expanded into its
     long file name, to avoid problems like these: (Mccollister)
@@ -2261,9 +2251,6 @@ Macintosh:
       one for B&W printing (if that can be detected).
 8   In Visual block mode with 'lbr' set, a change command doesn't insert the
     text in following lines where the linebreak changes.
-9   dosinst.c: The DJGPP version can't uninstall the Uninstall registry key on
-    Windows NT.  How to install a .inf file on Windows NT and how to detect
-    that Windows NT is being used?
 8   When 'virtualedit' is "block,insert" and encoding is "utf-8", selecting a
     block of one double-wide character, then "d" deletes only half of it.
 8   When 'virtualedit' is set, should "I" in blockwise visual mode also insert
@@ -2438,7 +2425,7 @@ Problems that will (probably) not be solved:
 -   Win32: All files created on the day of switching from winter to summer
     time cause "changed since editing started" messages.  It goes away when
     the file is written again the next day, or the timezone is adjusted.
-    DJGPP version is OK. (Zaimi)  Looks like a problem with the Win32 library.
+    Looks like a problem with the Win32 library.
     Rebooting doesn't help.  Time stamps look OK in directory. (Penn)
     Is this on FAT (stores wall clock time) or NTFS (stores UTS)?
 -   Win32, MS-Windows XP: $HOME uses the wrong drive when the user profiles
@@ -3151,8 +3138,6 @@ Performance:
 8   When displaying a space with only foreground highlighting, it's the same
     as a space without attributes.  Avoid displaying spaces for the "~" lines
     when starting up in a color terminal.
-8   Avoid alloc() for scratch buffer use, esp. in syntax.c.  It's very slow on
-    Win16.
 8   Profiling shows that in_id_list() is used very often for C code.  Can this
     function be improved?
 8   For an existing file, the page size of the swap file is always the
diff --git a/src/nvim/ex_cmds2.c b/src/nvim/ex_cmds2.c
index e7029b8762..d9a8dc2d69 100644
--- a/src/nvim/ex_cmds2.c
+++ b/src/nvim/ex_cmds2.c
@@ -2992,12 +2992,8 @@ void ex_checktime(exarg_T *eap)
 
 static char *get_locale_val(int what)
 {
-  char        *loc;
-
-  /* Obtain the locale value from the libraries.  For DJGPP this is
-   * redefined and it doesn't use the arguments. */
-  loc = setlocale(what, NULL);
-
+  // Obtain the locale value from the libraries.
+  char *loc = setlocale(what, NULL);
 
   return loc;
 }