Merge #13003: qa: Add test for orphan handling
Summary:
PR13003 backport https://github.com/bitcoin/bitcoin/pull/13003/files
fa02c5b qa: Clarify documentation for send_txs_and_test (MarcoFalke)
fadfbd3 qa: Add test for orphan handling (MarcoFalke)
Backport note: needed pad_tx for these
Depends on D3514
Test Plan:
test_runner.py p2p_invalid_tx.py
test_runner.py feature_block.py
Reviewers: deadalnix, Fabien, jasonbcox, #bitcoin_abc
Reviewed By: deadalnix, #bitcoin_abc
Differential Revision: https://reviews.bitcoinabc.org/D3527