GitLab

zlib1g-dev is required but there are cases when it's not installed on Ubuntu 20 by other dependencies

doxygen, libreadline-dev, etc. are in fact required, not optional

 - Use hiveio docker repository
 - There's only one type of node these days

delayed_voting_tests/scenario_01
operation_time_tests/vesting_withdrawals

HIVE_HARDFORK_1_25_MAX_OLD_GOVERNANCE_VOTE_EXPIRE_SHIFT value depends right now on HIVE_GOVERNANCE_VOTE_EXPIRATION_PERIOD blockchain parameter

- Changed HF25 date to:
a) 04. June for TESTNET build
b) 30. June for MAINNET build
- Changed delayed voting delay on TESTNET build to 1 day
- unit tests must be corrected.

- Removed bad usage of `elog` statements
- Cleaned up chain::dynamic_global_property_object (eliminated unused last_irreversible_block member)
- Loading new snapshot manifest should allow only single entry holding last_irreversible block number

[ABW]: [Fix] if user used all his allowed recurrent transfers he would be blocked from modifying existing transfer or removing one
Unit tests extended to cover above problem
[Fix] account_object::open_recurrent_transfers moved within object for better alignment
[Fix] recurrent_transfer_object constructor takes account_objects instead of ids
[Fix] fixes needed by linter
Also some indent/style corrections