bin/60899: syntax of config(1) options is not documented

["uwe%stderr.spb.ru@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60899
>Category:       bin
>Synopsis:       syntax of config(1) options is not documented
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 18 11:30:00 +0000 2026
>Originator:     Valery Ushakov
>Release:        NetBSD 11.0
>Organization:
>Environment:
>Description:
config(5) does not document the syntax of "value" in "defaparam" or "options".

When you learn from RTFS what the syntax is, you are still in for a
surprise, b/c

  options CNMAGIC="\"\\x27\\x01\""

results in

  #define CNMAGIC "\x27\x01"

but adding parens:

  options CNMAGIC="(\"\\x27\\x01\")"

results in

  #define CNMAGIC (\"\\x27\\x01\")


See fprintstr() in usr.bin/config/mkheaders.c

>How-To-Repeat:
Try to specify a kernel config option value that is not a simple string.

>Fix: