Why Vim breaks this  compatibility, with this patch I can not use Ctrl-s to 
stop the terminal!!
--------------
wsdjeg
>
>Patch 8.2.0852
>Problem:    Cannot map CTRL-S on some systems.
>Solution:   Do not use CTRL-S for flow control.
>Files:      src/os_unix.c
>
>
>*** ../vim-8.2.0851/src/os_unix.c      2020-05-30 18:14:37.828521058 +0200
>--- src/os_unix.c      2020-05-30 20:00:41.856511541 +0200
>***************
>*** 3482,3492 ****
>      {
>  // ~ICRNL enables typing ^V^M
>  tnew.c_iflag &= ~ICRNL;
>- # ifdef IXON_NOT_USED
>  // Do not make CTRL-S stop output, for most users it is unexpected and
>  // is hardly ever useful.
>  tnew.c_iflag |= IXON;
>- # endif
>  tnew.c_lflag &= ~(ICANON | ECHO | ISIG | ECHOE
>  # if defined(IEXTEN) && !defined(__MINT__)
>      | IEXTEN     // IEXTEN enables typing ^V on SOLARIS
>--- 3482,3490 ----
>*** ../vim-8.2.0851/src/version.c      2020-05-30 19:52:42.270340843 +0200
>--- src/version.c      2020-05-30 19:58:42.416967148 +0200
>***************
>*** 748,749 ****
>--- 748,751 ----
>  {   /* Add new patch number below this line */
>+ /**/
>+     852,
>  /**/
>
>--
>hundred-and-one symptoms of being an internet addict:
>219. Your spouse has his or her lawyer deliver the divorce papers...
>     via e-mail.
>
> /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net \\\
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