Work around mailparse bug (?) with messages that have no terminal newline
Summary: Under some unusual circumstances, mailparse appears to incorrectly discard the last line of some mail messages.
Test Plan:
- Constructed a raw mail with no terminal newline.
- Piped it into mail_receiver.php.
- Saw the last line vanish into the aether.
- Applied patch; repeated; last line survived.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: chad, epriestley
Differential Revision: https://secure.phabricator.com/D12494