tests: iptables-test: Support variant deviation

Some test results are not consistent between variants:

* CLUSTERIP is not supported with nft_compat, so all related tests fail
  with iptables-nft.
* iptables-legacy mandates TCPMSS be combined with SYN flag match,
  iptables-nft does not care. (Or precisely, xt_TCPMSS.ko can't validate
  match presence.)

Introduce an optional fourth test spec field to specify the variant it
applies to. Consequently, the opposite result is expected with the other
variant.

Signed-off-by: Phil Sutter <phil@nwl.cc>

0 files changed, 0 insertions, 0 deletions