toolchain/54347: postinstall(8) is killing too many local modifications now

[martin%NetBSD.org@localhost]

>Number:         54347
>Category:       toolchain
>Synopsis:       postinstall(8) is killing too many local modifications now
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 06 07:10:00 +0000 2019
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.50
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD martins.aprisoft.de 8.99.50 NetBSD 8.99.50 (GENERIC) #0: Fri Jul 5 17:23:30 CEST 2019 martin%martins.aprisoft.de@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

Since recent changes postinstall(8) overwrites /etc/X11/xdm/Xservers after
every install. This file is more like /etc/ttys and /etc/fstab, it has
local modifications in a lot of my installations and there is no easy way
(like rc.conf) to override X server options, and some of them (like -listen)
seem to have no equivalent in xorg.conf.

>How-To-Repeat:
s/a

>Fix:
n/a