bsdinstall: Attempt setting the date with NTP

[des]

Summary

Before asking the user to set the date and time manually, check if we
are able to resolve freebsd.pool.ntp.org, and if so, offer to set the
date and time automatically.

[imp]

This would have helped me a lot...
I never know what to do about ntpdate in scripts...

usr.sbin/bsdinstall/scripts/time

48

How much longer will we have ntpdate? On the one hand, it's been declareed obsolete. On the other, i think we are entering the second decade of obsolescence...

[des]

usr.sbin/bsdinstall/scripts/time

48

Don't worry about it, if it ever goes away I have a replacement pretty much ready.

[jrtc27]

usr.sbin/bsdinstall/scripts/time

48

This doesn't work, the exit code is sed's, so will always succeed unless something goes wrong with sed itself.

[jrtc27]

usr.sbin/bsdinstall/scripts/time

48

jrtc4@amoracia:~$ if ! ntperr=$(ntpdate freebsd.pool.ntp.org 2>&1 | sed 's/^.*\]: //'); then echo failed; fi
jrtc4@amoracia:~$ if ! ntperr=$(ntpdate freebsd.pool.ntp.org 2>&1); then echo failed; fi
failed
jrtc4@amoracia:~$ freebsd-version
14.2-RELEASE-p3

if you want proof (failing because I'm not root)

[des]

usr.sbin/bsdinstall/scripts/time

48

no, I don't want proof, please leave the chip on your shoulder at the door.