patch 9.0.0943: pretending to go out of Insert mode when Esc is received

Problem:    Pretending to go out of Insert mode when Esc is received has side
            effects.
Solution:   When the kitty keyboard protocol is enabled expect Esc to always
            be the start of an escape sequence.

src/getchar.c

@@ -3263,12 +3263,14 @@ vgetorpeek(int advance)
  * get a character: 3. from the user - handle <Esc> in Insert mode
  */
 		/*
-		 * Special case: if we get an <ESC> in insert mode and there
+		 * Special case: if we get an <ESC> in Insert mode and there
 		 * are no more characters at once, we pretend to go out of
-		 * insert mode.  This prevents the one second delay after
+		 * Insert mode.  This prevents the one second delay after
 		 * typing an <ESC>.  If we get something after all, we may
 		 * have to redisplay the mode. That the cursor is in the wrong
 		 * place does not matter.
+		 * Do not do this if the kitty keyboard protocol is used, every
+		 * <ESC> is the start of an escape sequence then.
 		 */
 		c = 0;
 		new_wcol = curwin->w_wcol;
@@ -3277,6 +3279,7 @@ vgetorpeek(int advance)
 			&& typebuf.tb_len == 1
 			&& typebuf.tb_buf[typebuf.tb_off] == ESC
 			&& !no_mapping
+			&& kitty_protocol_state != KKPS_ENABLED
 			&& ex_normal_busy == 0
 			&& typebuf.tb_maplen == 0
 			&& (State & MODE_INSERT)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    943,
 /**/
     942,
 /**/