re6stnet configuration files

re6stnet is started automatically if /etc/re6stnet contains a 're6stnet.conf'
file with all parameters to pass to the daemon.
Same for the registry: all parameters must be specified in 're6st-registry.conf'

So for a normal node, you should have the following files:
  re6stnet.conf ca.crt cert.crt cert.key
And if you also host the registry:
  re6st-registry.conf ca.key

If you still have a dh2048.pem file in this folder, you can remove it,
as well as the corresponding 'dh' line in re6stnet.conf