Detect alternate Danish outlook reply pattern

Summary: Sometimes we get a lowercase "Meddelelse" in Danish outlook. Relax the patterns since the risk of hitting false positives here is essentially nonexistant.

Test Plan: Unit tests.

Reviewers: davidreuss, btrahan, vrana

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D2205