Emmanuel Gil Peyrot 8b6f5953a7 XEP-0319: Use the correct timezone.
This fixes a specification violation, XEP-0082 says that a date MUST
have a timezone, but we were sending the *local* time without any
timezone information.
2017-07-17 22:20:30 +01:00
..
2014-07-17 14:19:04 +02:00
2017-07-17 22:20:30 +01:00