Bug#775541: tests of new packages

[Vincent McIntyre <vincent.mcintyre@csiro.au>]

I found one further issue which is related to  #738063.

I wanted to limit the exports to supporting version 2 and 3.

I first set RPCMOUNTDOPTS="--manage-gids --no-nfs-version 4"
as explained in /etc/default/nfs-kernel-server.
But I found I also needed add the following to that file:

   RPCNFSDPRIORITY=0

 + # other options for nfsd
 + # To disable NFSv4 on the server, specify '--no-nfs-version 4' here also
 + RPCNFSDOPTS="--no-nfs-version 4"


I discovered this by reading the source of the new script
/usr/lib/systemd/scripts/nfs-utils_env.sh
which constructs the RPCNFSDARGS variable used in
the /lib/systemd/system/nfs-server.service file.

If you upload a new version of this package, could you add an
empty definition of RPCNFSDOPTS to /etc/default/nfs-kernel-server,
so people can find it?

Users of the init script would also benefit from this change.

Thanks
Vince