what to put under init.d

Just new to Subversion: installed it with "apt-get install" on my
debian-unstable system.
As I'm a programmer not a Unix freak I know as much of Linux as I need
for now.

I understood that on Linux I can start the server with

svnserve -i

After that the server works fine for me with the svn+ssh:// protocol.

And: it occupies the terminal - even if I start it with

svnserve -i &

Now I would like to startup svnserve while booting the system.
Usually I find a script beneeth /etc/init.d that I have to link to in
/etc/rcS.d.
But I could not find one after installation.

Do you have one that works?
Do I have this problem due to my limited knowledge about Linux or about
Subversion?
Could not find a hint in the documentation. I read chapter 6 more than
one time.

Thanks

Rolf