When the target is a channel it is not in, it would treat it as a user;
which, if userCapabilityRequired is empty, would unconditionally send it
to a channel.
This would usually result in an error, that would be logged,
hence the loop.
Starting with this commit, there should be no "original" text
in READMEs.
Instead, the entire text should be in docstrings, and READMEs
should be automatically generated from these docstrings.
Motivation:
* The same help is available both via IRC and in the README
(although the README can be more detailed, as only the first
paragraph will be shown on IRC)
* This will allow auto-generating plugin help on docs.limnoria.net
using the same content as the README, as it's sourced from the
docstrings
Additionally, this converts all READMEs from Markdown to ReST,
because the documentation already uses ReST, and other docstrings
in the codebase are in ReST for this reason.
