- Implemented functions get_replica_name and get_source_name in lib/MasterSlave.pm I did not implement similar functions in other places, because they set other variables as well, not only replica_name or source_name.
- s/slave lag/replica lag/ in tests
- reverted rename of COM_REGISTER_SLAVE to COM_REGISTER_REPLICA, because the constant still named COM_REGISTER_SLAVE in 8.4
- removed some slave leftovers from pt-replica-find
- Added test for replica lag check for pt-archiver
- Re-added deprecated slave- options
- Added tests for deprecation warnings and for legacy options for pt-archiver
- Removed practically not supported options --replica-user and --replica-password from pt-archiver, pt-kill, pt-query-digest
- Added legacy source/replica options (master/slave) variants and tests for pt-heartbeat, pt-online-schema-change, pt-replica-find, pt-replica-restart, pt-table-checksum, pt-table-sync
- Updated modules after lib/MasterSlave.pm change
