xsrc/42135: startx need -noretro server args now

[martin%NetBSD.org@localhost]

>Number:         42135
>Category:       xsrc
>Synopsis:       startx need -noretro server args now
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 28 10:40:00 +0000 2009
>Originator:     Martin Husemann
>Release:        NetBSD 5.99.18
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD nelly.aprisoft.de 5.99.18 NetBSD 5.99.18 (NELLY) #2: Sun Sep 27 
08:41:25 CEST 2009 
martin%emmas.aprisoft.de@localhost:/nelly/usr/src/sys/arch/sparc64/compile/NELLY
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

After going back to retro style by default, startx (and probably the default
xdm config) should grow a -noretro server arg.

Like:

  defaultserverargs="-noretro"

in startx. This avoids the irritating flicker when starting up the X server
before the user configured "real background" is displayed.

Note that this does *not* reintroduce the annoying problems leading to
the retro change, as both xdm and startx will run clients ASAP, so there
will be something visible instead of a dead black screen.

>How-To-Repeat:
code inspection

>Fix:
n/a