patch 8.2.2919: using ":!command" does not work if it uses posix_spawn()

Problem:    Using ":!command" does not work if the command uses posix_spawn().
Solution:   Do not call ioctl() with TIOCSCTTY. (Felipe Contreras)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2919,
 /**/
     2918,
 /**/