bsdinstall: Add ntpdate option

[manu]

Summary

When you install a computer for the first time, the date in the CMOS is accurate anymore and you need to ntpdate as ntpd will fail a the time difference is too big.
Add an option in bsdinstall to enable ntpdate that will do that for us.

[allanjude]

Note: the modern installer has an entire UI dedicated to you setting the date correctly during the install.

But adding this to the services list seems reasonable.

[manu]

In D13149#273816, @allanjude wrote:

Note: the modern installer has an entire UI dedicated to you setting the date correctly during the install.

But adding this to the services list seems reasonable.

Yes but if you "miss-click" when it prompts you to enter the time you're screwed (trust me I've been there :P )