Fix a blunder in documentation

[Svetlana-T]

I think the help should say "- a channel name pattern does not start with a wildcard or a #, or" instead of "- a channel name pattern starts with a wildcard or a #, or"

Relevant code

https://github.com/atheme/atheme/blob/master/modules/alis/main.c#L135

Brought up by ccat at #freenode on 28 April 2017, merged into atheme in commit 2fbcdf4 a few months ago