Changelog for 3.0-578

Revert Rodolfo's recent zcomploc commits until they actually work correctly.

This reverts commit 402006a83a89bc0f790934096e915f0e8c23f808.
This reverts commit 48d8d71391fc2cc40d85732680eb6421164bf87c.
This reverts commit 450dcc9d2cd874f6ab40d4a339afc29f55751319.