ssh: cli not handling latin1 put_char requests

When starting a ssh daemon with a shell, connecting to it and pressing
CTRL+C on the ssh client, a message appears on the host machine:
```
1> application:ensure_all_started(ssh).
{ok,[crypto,asn1,public_key,ssh]}
2> ssh:daemon(2222, [{shell,{shell,start,[]}}, {system_dir, "."}, {exec,erlang_eval}, {pwdfun, fun(_,_) -> true end}]).
{ok,<0.100.0>}

{unhandled_request,{put_chars_sync,latin1,<<"** ">>,undefined}}
```

This commit addresses that by properly processing latin1 encodings in
`ssh_cli`, as `user_drv` already managed these cases.

Author: Alberdi

lib/ssh/src/ssh_cli.erl

@@ -450,8 +450,13 @@ io_request(delete_after_cursor, TTY, _State) ->
     prim_tty:handle_request(TTY, delete_after_cursor);
 io_request(delete_line, TTY, _State) ->
     prim_tty:handle_request(TTY, delete_line);
+io_request({put_chars, latin1, Chars}, TTY, _State) ->
+    prim_tty:handle_request(TTY, {putc, unicode:characters_to_binary(Chars, latin1)});
 io_request({put_chars, unicode, Chars}, TTY, _State) ->
     prim_tty:handle_request(TTY, {putc, unicode:characters_to_binary(Chars)});
+io_request({put_chars_sync, latin1, Chars, Reply}, TTY, State) ->
+    State#state.group ! {reply, Reply, ok},
+    prim_tty:handle_request(TTY, {putc, unicode:characters_to_binary(Chars, latin1)});
 io_request({put_chars_sync, unicode, Chars, Reply}, TTY, State) ->
     State#state.group ! {reply, Reply, ok},
     prim_tty:handle_request(TTY, {putc, unicode:characters_to_binary(Chars)});