Allow "bin/mail send-test" to accept raw email addresses via "--to"
Summary: Ref T12372. This supports testing the wordwrap() patch discussed in that task.
Test Plan:
- Ran bin/mail send-test --to email@domain.com
- Ran bin/mail send-test --to username
Reviewers: chad, lvital
Reviewed By: lvital
Maniphest Tasks: T12372
Differential Revision: https://secure.phabricator.com/D17489