sudo: update and do not use a pty for now

[citrus-it]

No description provided.

[citrus-it]

I've tested this on OmniOS bloody and it resolves the problem. We probably need to follow up with an investigation into why creating a new pty is problematic on OmniOS.

% sudo stty
speed 38400 baud; -parity
rows = 70; columns = 80; ypixels = 2380; xpixels = 1120;
swtch = <undef>;
brkint -inpck -istrip icrnl imaxbel onlcr tab3
echo echoe echok echoctl echoke iexten

% pfexec mv /etc/sudoers.d/_omnios_nopty /tmp

% sudo stty
speed 9600 baud; -parity
swtch = <undef>;
brkint -inpck -istrip icrnl -ixany imaxbel onlcr tab3
echo echoe echok echoctl echoke iexten