bin/57042: netpgp --help requires keyring for printing the usage

[roland.illig%gmx.de@localhost]

>Number:         57042
>Category:       bin
>Synopsis:       netpgp --help requires keyring for printing the usage
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 02 13:15:00 +0000 2022
>Originator:     Roland Illig
>Release:        9.99.100
>Organization:
>Environment:
NetBSD nbcurr.roland-illig.de 9.99.100 NetBSD 9.99.100 (GENERIC) #0: Fri Sep 30 14:32:45 UTC 2022  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
In a freshly created user account, run:

$ netpgp
NetPGP portable 3.99.18/[20101103]
...

This prints the usage, as expected.

$ netpgp --help
/home/tmp/.gnupg/pubring.gpg: No such file or directory
Can't read pubring /home/tmp/.gnupg/pubring.gpg
can't initialise

There is no need to read the user's keyring just to print the usage.
>How-To-Repeat:

>Fix: