helper images "DCburn" and "DCserv" for NetBSD/dreamcast 7.0

I wrote:

> NetBSD 5.1 has been announced, but I guess there are still
> two annoying procedures for ordinary users to try NetBSD/dreamcast:
> 
>  - Create a bootable CD-R with NetBSD/dreamcast kernel
>  - Setup NFS/DHCP server for diskless dreamcast client
> 
> To make these procedures easier, I've created two pre-built
> NetBSD/i386 disk images, "DCburn" and "DCserv":
>  http://ftp.NetBSD.org/pub/NetBSD/arch/dreamcast/dcburn/
>  http://ftp.NetBSD.org/pub/NetBSD/arch/dreamcast/dcserv/
> 
> "DCburn" image provides easy setup to burn
> bootable CD-R for NetBSD/dreamcast.
> 
> "DCserv" image provides easy setup for NetBSD/dreamcast
> which requires "root file system on NFS" environment to boot.
> 
> All things you need to use these images are
> to write each image to a USB flash memory,
> put it on your x86 PC bootable from USB,
> and type a few commands on NetBSD prompt.

I've uploaded updated dcburn/dcserv images for NetBSD/dreamcast 7.0.

See README files for details:
 http://ftp.NetBSD.org/pub/NetBSD/arch/dreamcast/dcburn/README.txt
 http://ftp.NetBSD.org/pub/NetBSD/arch/dreamcast/dcserv/README.txt

"Happy 17th Birthday, Dreamcast!"
 http://kotaku.com/happy-17th-birthday-sega-dreamcast-1744837431
 https://twitter.com/tsutsuii/status/669894218643431424
 https://twitter.com/tsutsuii/status/669899565504462848
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Izumi Tsutsui