remote: mention libssh in error message

Mention libssh as possible transport in the error message of an
unrecognized transport.

https://bugzilla.redhat.com/show_bug.cgi?id=1727013Signed-off-by: NPino Toscano <ptoscano@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

src/remote/remote_driver.c

@@ -825,7 +825,7 @@ doRemoteOpen(virConnectPtr conn,
             } else {
                 virReportError(VIR_ERR_INVALID_ARG, "%s",
                                _("remote_open: transport in URL not recognised "
-                                 "(should be tls|unix|ssh|ext|tcp|libssh2)"));
+                                 "(should be tls|unix|ssh|ext|tcp|libssh2|libssh)"));
                 return VIR_DRV_OPEN_ERROR;
             }
         }