lock(1): Add EXAMPLES section

[fernape]

Summary

Add simple example showing the use of the flags: p, t, v

Test Plan

• mandoc -Tlint clean
• igor clean
• aspell happy
• man ./lock.1 renders the page properly

[gbe]

usr.bin/lock/lock.1

77 ↗

(On Diff #80525)

I would reword this sentence in "5 minutes and disabling switching of virtual terminals".

[fernape]

usr.bin/lock/lock.1

77 ↗

(On Diff #80525)

Oh, it is actually a "for" meaning, that in 5 minutes it will be unlocked even if the password was not typed in:

$ date && lock -t 1 -p
Thu Dec 10 22:03:41 CET 2020
lock: fernape using pts/13 on XXXX. timeout in 1 minute.
time now is Thu Dec 10 22:03:41 CET 2020
Password:lock: timeout
$ date
Thu Dec 10 22:04:47 CET 2020

[fernape]

usr.bin/lock/lock.1

77 ↗

(On Diff #80525)

Ok, I misunderstood :-)

Since I don't want to repeat "and", what about I commit this one?

Lock the terminal for 5 minutes, disable switching virtual terminals and use the user's login password to unlock:

[yuripv]

usr.bin/lock/lock.1

77 ↗

(On Diff #80525)

May be "require" instead of "use"?

[fernape]

s/use/require as suggested by yuripv@

[fernape]

usr.bin/lock/lock.1

77 ↗

(On Diff #80525)

May be "require" instead of "use"?

Sounds better. Thanks!

[fernape]

Thank you both for the review!