Fixes#737. Before this commit, startup of
Joinmarket-Qt does not necessarily work "out
of the box" due to changes in PyQt 5.15 that
create external dependencies on shared libraries,
see comments on the Issue for details.
While we had formerly pinned PyQt 5.14, it is
in fact necessary to also pin the version of
PySide2 to the same 5.14.2 to remove the
problem.
updated xenial and stretch dockerfiles since they bundle old versions of libsodium
refacatoring to make BlockchainInterface and BitcoinCoreNoHistoryInterface python2 compatible
add the -acceptnonstdtxn flag when invoking bitcoind for versions >= 0.19.0
refactor the use of nonlocal to make it compatible with python2
document the get_bitcoind_version method
Kristaps Kaupe
Wukong
Adam Gibson
Tim Akinbo