Notice of upcoming changes: deprecating the TWITCHCLIENT command

@jrizzo Looks like the error id for trying to host someone when not a Twitch editor is the same one you get for trying to time someone out when you’re not a moderator. Any chance editor permissions and mod permissions can be separated into different ids? At the moment the msg-id is “no_permission.”
It’s creating issues with “Do I not have Twitch editor privileges, or am I not being detected as a mod?.”

The NOTICE is “@msg-id=no_permission :tmi.twitch.tv NOTICE #moocat :You don't have permission to perform that action.

EDIT: This applies to both the /host and /unhost commands.