Add a forward slash to the generated paths for citadel.key,

Add a forward slash to the generated paths for citadel.key,
citadel.csr, and citadel.cer.  Without it, they were getting generated as
'/usr/local/citadel/keyscitadel.*' instead of '/usr/local/citadel/keys/citadel.*' which
is incorrect.  If this creates double slashes in the FSSTND version, that's ok, the
kernel will strip them out.