Dear Maintainer,

Currently, the postinst script for nfs-kernel-server restarts
nfs-kernel-server on update.  This is completely stops the NFS server,
killing all connections, as explained in rpc.nfsd(8). While clients will
reconnect, this seems to be an unnecessary interuption. Moreover, should
for some reason the NFS server fail te start, then the consequences are
more severe.

Therefore, I suggest that nfs-kernel-server/nfs-server should not but
restarted on package updates. In which way this is accomplished isn't
entirely clear to me as other services restart with nfs-server, and it
may be advised to restart those on upgrade.

Thoughts?