Make user emails case-insensitive

Summary: Ref T1191. Same deal as D10786. These were previously case-insensitive, but changed to a case-sensitive column type.

Test Plan: Ran `bin/storage adjust` and got and adjustment.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: webframp, epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10806

src/applications/people/storage/PhabricatorUserEmail.php

@@ -17,7 +17,7 @@ final class PhabricatorUserEmail extends PhabricatorUserDAO {
   public function getConfiguration() {
     return array(
       self::CONFIG_COLUMN_SCHEMA => array(
-        'address' => 'text128',
+        'address' => 'sort128',
         'isVerified' => 'bool',
         'isPrimary' => 'bool',
         'verificationCode' => 'text64?',