add iptables unit test infrastructure

This patch adds a python script to verify unit test cases.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libipt_ah: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libip6t_ah: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libipt_LOG: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_addrtype: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libip6t_LOG: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_cluster: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_comment: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_AUDIT: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_CHECKSUM: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_CLASSIFY: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_connbytes: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_connlimit: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_connmark: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_CONNMARK: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_hashlimit: add unit test

based on tests/options-most.rules

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_time: add unit test

based on tests/options-most.rules

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_length: add unit test

based on tests/options-most.rules

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_udp: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
extensions: libxt_tcp: add unit test

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>