bin/59979: sshd -T doesn't print UsePam

["campbell+netbsd%mumble.net@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         59979
>Category:       bin
>Synopsis:       sshd -T doesn't print UsePam
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 08 02:50:00 +0000 2026
>Originator:     Taylor R Campbell
>Release:        current, 11, 10, 9, ...
>Organization:
>Environment:
>Description:
     -T      Extended test mode.  Check the validity of the configuration
             file, output the effective configuration to stdout and then exit.
             Optionally, Match rules may be applied by specifying the
             connection parameters using one or more -C options.

This works for various options like AuthenticationMethods:

# sshd -T | grep -i authenticationmethods
authenticationmethods publickey
# 

But it doesn't show UsePam:

# sshd -T | grep -i usepam
# 
>How-To-Repeat:
sshd -T
>Fix:
Yes, please!