Replaces the placeholder MOTD with a usable one: a coloured header, five house
rules, the NickServ/ChanServ/SASL commands people actually need, and a short
"worth knowing" section.
The retention line is generated rather than hard-coded, so it matches the
deployment instead of drifting from it: HISTORY=off says messages are not
stored, otherwise it names the real HISTORY_EXPIRE. Users are told plainly that
channels are logged and for how long, which is the honest counterpart to
enabling persistent history by default.
Rendered and checked: valid UTF-8 (an invalid byte makes the whole config fail
to load), ASCII-only for old clients, no stray $-escapes, only documented colour
names, and 72 columns at the widest.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>