[LTP] pty09: Cap RLIMIT_NOFILE-based slave PTY opens

[Cyril Hrubis]

Hi!
>   tst_res(TINFO, "Available number of pids: %u (capped at %d)",
>           max_pid_num, MAX_SLAVE_OPENS);

Agree here, the message was confusing and this one looks better.

-- 
Cyril Hrubis
chrubis@suse.cz