It seems useful to be able to run ssh_server_fork without being
required to load some key of RSA and DSA keytypes. However, with the
current ssh_server_fork, you need to have some keys as some default
value is set by default and you can't unset the value for a keytype
(e.g. by using NULL as an argument). So the "no default keys"
argument turns off the default key assignments.
Signed-off-by: Alan Dunn <amdunn@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>