databases
Summary: This is a stopgap patch until we fix T345/T327 properly, but you can't
add a 512-character key to a UTF-8 column because it creates an index on more
than 767 bytes, which is the key length limit.
Test Plan: Ran schmea upgrade script.
Reviewers: indiefan, btrahan, jungejason
Reviewed By: jungejason
CC: aran, epriestley, xela, jungejason
Maniphest Tasks: T327
Differential Revision: https://secure.phabricator.com/D1391
