NetBSD: disable secure-rpc to fix FTBS
secure-rpc relies on rpc DES auth method, which isn't available (anymore) on NetBSD, so the build breaks if it's not explicitly disabled.
../os/rpcauth.c: In function ‘authdes_ezdecode’:
1431../os/rpcauth.c:110:52: error: invalid use of undefined type ‘struct authdes_cred’
1432 110 | return (((struct authdes_cred *) r.rq_clntcred)->adc_fullname.name);
1433 | ^~
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
Edited by Alan Coopersmith