1) Makes the code for block 44 consistent with the expected figure in
the comment above it by adding a transaction to the block
2) Fixed comment describing sign_tx() function
Bitcoin core has a standardness rule for max satisfaction script sig size.
This PR adds to the policy header file so that it is documented along with
along policy rules. The initial reasoning that 1650 is an implicit
limit(would not reached assuming all other policy rules are being
followed) is outdated.
As we now know, bitcoin transactions can have spend conditions are more than
just signatures and there may exist p2sh transactions involving 100 byte
preimages that maybe non-standard because of this rule. Because this
rule is no longer implicit, we should explicitly document it in policy
header file
Error messages in cleanstack is misleading as
it lets the user believe that there are extra
elements on stack which is incorrect if the
stack is empty.