Issue: 2982
This commit moves bsize validation with respect to content matches to
the post-parse validation stage. This allows bsize to consider all
content-related values, including those that follow the bsize keyword.
This commit adds validation of the bsize value(s) with the available
buffer size. Signatures are flagged if the bsize and buffer size are
incompatible.
Issue: 3682
Allows matching on stickybuffers. Like dsize, it allows matching on
exact values, greater than and less than, and ranges.
For streaming buffers, such as HTTP bodies, the final size of the
body is only known at the end of the transaction.