patch 8.0.1611: CTRL-W in system terminal does not go to job

Problem:    CTRL-W in system terminal does not go to job.
Solution:   Do not use CTRL-W as a terminal command in a system terminal.

Author: brammool

src/terminal.c

@@ -2007,8 +2007,13 @@ terminal_loop(int blocking)
 	if (ctrl_break_was_pressed)
 	    mch_signal_job(curbuf->b_term->tl_job, (char_u *)"kill");
 #endif
-	/* Was either CTRL-W (termkey) or CTRL-\ pressed? */
-	if (c == (termkey == 0 ? Ctrl_W : termkey) || c == Ctrl_BSL)
+	/* Was either CTRL-W (termkey) or CTRL-\ pressed?
+	 * Not in a system terminal. */
+	if ((c == (termkey == 0 ? Ctrl_W : termkey) || c == Ctrl_BSL)
+#ifdef FEAT_GUI
+		&& !curbuf->b_term->tl_system
+#endif
+		)
 	{
 	    int	    prev_c = c;
 

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1611,
 /**/
     1610,
 /**/