misc/60253: "-c" option used in nc(1) man page example, but not documented

["jlmuir%imca-cat.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60253
>Category:       misc
>Synopsis:       "-c" option used in nc(1) man page example, but not documented
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 12 16:55:00 +0000 2026
>Originator:     J. Lewis Muir
>Release:        current
>Organization:
>Environment:
n/a
>Description:
In the EXAMPLES section of the nc(1) man page

  https://man.netbsd.org/nc.1

the second example uses the "-c" option

  $ nc -v -c -e adsf.au.doubleclick.net www.google.ca 443

but the "-c" option is not documented in the nc(1) man page.
>How-To-Repeat:
n/a
>Fix:
If the "-c" option is supported but not documented, add the "-c" option to the SYNOPSIS and DESCRIPTION sections of the nc(1) man page.

If the "-c" option is not supported, change the example in the nc(1) man page to not use it.

Looking at the source code

  https://nxr.netbsd.org/xref/src/usr.bin/nc/netcat.c

it seems that the option is supported if the CRYPTO macro evaluates to true.  (And FYI, it looks like there are other options that are also not documented for the same case.)