open_init_pty: Do not make stdin and stdout non-blocking

It is unclear why this was being done in the first place, and
it has caused multiple bugs with run_init/open_init_pty usage.

Fixes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=863187
Fixes: https://bugs.gentoo.org/show_bug.cgi?id=621062
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
1 file changed