It previously said "the following commands" were supported
and it was only listing subcommands (help, stop, ..)
without any indication of how the user should construct the full command
(`PREFIX SUB_COMMAND`).
For perfect clarity, we now list full commands in the help message. Example:
> The following commands are supported:
>
> - !pm help - Show this help message
> - !pm stop - Disable bridge for the room and clear all configuration
> - !pm mailbox - Get or set mailbox of the room
> - !pm owner - Get or set owner of the room
> - !pm nosender - Get or set nosender of the room (true - hide email sender; false - show email sender)
> - !pm nosubject - Get or set nosubject of the room (true - hide email subject; false - show email subject)
The new help message is prefix-aware, instead of hardcodign `!pm`.
If the bot is running with a custom prefix (not `!pm`), this is even
more helpful, as it lets people know what the prefix is. Reading
documentation elsewhere and seeing `!pm STUFF` will no longer confuse
anyone.
With this change, we also make use of the existing `Notice()` function,
so we don't need to duplicate some code related to sending notices.
cda8ee0a25