Release 4.3.0.5

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2020/07/30: Free, Premium, v4.3, WPf2b

This is a bugfix release. You do not need to update your filters from 4.3.0.

Fix empty username detection for multisite.
Fix harmless warning when activating new multisite install.
Fix esoteric edge-case where wp-load.php is loaded via a script run from the CLI in a directory with a functions.php file.