Wrong timestamp format on Entity Time answer
Received this today from a 0.13-dev poezio,
[17:47:16] lovetox: 03.04.2019 17:44:55 (W) gajim.c.m.entitytime | (jabber.fr) Wrong timezone defintion: 2019-04-03T15:44:59.648231 somejid
Now i see this is an edge case, as the XEP does enclose a 0082 timestamp in a
<utc> tag, which makes it seem like the timezone (Z) is useless to add here. But without the timezone its just not a valid 0082 timestamp anymore.