Server: its chat lines in colours the owner chooses; protocol 45
A dedicated server's own lines in chat (its welcome, console messages and
answers) were made violet in #129. The owner can now pick the colours.
- "chat_color": the "Server" badge and name, as "#RRGGBB" (default
"#8E5CFF", violet).
- "chat_text_color": the text of those lines (default "#D9C8FF", lavender).
- Both are in the config's "server" section; a value that is not a colour
stops the server from starting and names the setting.
- Console: chat-color <#badge> [<#text>]. Saved, and sent to everyone on
the server, so the next line uses it.
- With the defaults, chat looks as it did.
The colours travel in the roster, so this is protocol 45: servers and
games must both update. Lobbies hosted by a player are unchanged.