Initial support for external getty

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/tty.h

@@ -37,6 +37,9 @@ typedef struct {
 	int    noclear;
 	int    runlevels;
 
+	char  *cmd;		/* NULL when running built-in getty */
+	char  *args[10];
+
 	int    pid;
 } finit_tty_t;