Any projects which want to use Hush code from now on will need to be licensed as
GPLv3 or we will send the lawyers: https://www.softwarefreedom.org/
Notably, Komodo (KMD) is licensed as GPLv2 and is no longer compatible to receive
code changes, without causing legal issues. MIT projects, such as Zcash, also cannot pull
in changes from the Hush Full Node without permission from The Hush Developers,
which may in some circumstances grant an MIT license on a case-by-case basis.
Initial cleanup. Reduces duplication of code, especially around
constructing transactions, resetting the activation heights, and setting
up the EXPECT calls for accepting and rejecting tests.
Also adds a bunch of comments explaining the test plan and what
particular parts of the test are doing.