No need to use pseudo-cbreak mode now that we use pipes when stdout is

not a tty.  Instead, check whether stdin is a tty and if not, delay
setting the tty to raw mode until the command tries to access it itself
(and receives SIGTTIN or SIGTTOU).

src/sudo.h

@@ -178,7 +178,7 @@ void script_setup(uid_t);
 int term_cbreak(int);
 int term_copy(int, int);
 int term_noecho(int);
-int term_raw(int, int, int);
+int term_raw(int, int);
 int term_restore(int, int);
 
 /* fmt_string.h */