install/60347: Installation notes do not document base32/debug32/base64/debug64 sets

["martin%NetBSD.org@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60347
>Category:       install
>Synopsis:       Installation notes do not document base32/debug32/base64/debug64 sets
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    install-manager
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun 21 11:05:00 +0000 2026
>Originator:     Martin Husemann
>Release:        NetBSD 11.99.6
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD martins.aprisoft.de 11.99.6 NetBSD 11.99.6 (GENERIC) #305: Sun Jun 14 16:08:28 CEST 2026 martin%martins.aprisoft.de@localhost:/home/martin/current/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

The installation notes (e.g.
https://cdn.netbsd.org/pub/NetBSD/NetBSD-11.0_RC5/amd64/INSTALL.html)
document all sets in the distribution - but the compat sets are not
noted there.

Fixing that is mostly a matter of reorganizing the makefile fragments
that controll them, e.g. from src/usr.sbin/sysinst/Makefile.inc
the parts the add -DHAVE_BASE32 and friends to CPPFLAGS for sysinst.

This should be moved to a separate *.inc file and reused in
src/distrib/notes/Makefile.inc to add corresponding variables to PRESET
so the text in common/ can be conditionally adjusted.

>How-To-Repeat:
s/a

>Fix:
n/a