add mark event filter

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b4 am [email protected]

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#	Subject and files	Size	Replies	Applied
1/2	conntrack: add mark event filter`include/internal/object.h` `include/libnetfilter_conntrack/libnetfilter_conntrack.h` `src/conntrack/bsf.c` +1 more	+94 -0	0 replies
2/2	qa: add test for mark event filter`qa/Makefile.am` `qa/ct_mark_filter.c` `qa/ct_mark_filter.sh` +1 more	+191 -2	0 replies

No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.

Cover letter [PATCH lnf-ct 0/2] add mark event filter

Hi,

This patchset adds mark filter for event listener and its test. Would you review?