In this commit, we simplify the code that generates the test vectors to
only generate filters for a target fp of 19, and also only for the
regular filter, as it's the only filter type currently defined.
The test vectors have also been updated to include the previous output
scripts for all input within a block as these are now required to
construct the regular filter.
Finally, the generation code has been updated to properly fetch the
previous input scripts to the generation code can verify the filter it
generates manually against the end server.
In this commit, we modify regular filter construction slightly. Rather
than including each pushed data in the script, we instead just include
the script directly, which will eventually be hashed. The rationale for
doing this is two-fold:
* Most scripts today and in the foreseeable future will just be a
commitment.
* Including only the script itself and not the hash of the script
reduces the worst case filter size. Otherwise, an attacker could
include a bunch of 2 byte push datas and blow up the filter size for
all nodes.
Olaoluwa Osuntokun