Slack's names, which is what people expect to find when they arrive. The
channel names and their display names move together: town-square -> general,
off-topic -> random.
The name list existed twice, verbatim, in App.DefaultChannelNames and
TeamService.DefaultChannelNames, with a third copy of the literals in the web
app's constants and a fourth in the display-name map. All four now read
model.DefaultChannelName / model.RandomChannelName, so the server and the
client cannot drift apart about which channel a member may not leave.
Existing teams keep the channels they already have -- these constants are read
when a team is created, not on boot, so nothing is renamed underneath anyone.
zooqueen
6e187bbd5d