IRC is an essential part of being an OpenStack developer. There are a
billion ways to interact with IRC, and the best way is to learn
about them. However, some people are starting completely from scratch,
so collecting some information for them with pointers to full docs is
maybe a nice thing to do.
Change-Id: Ie4e3ec74eaac6f8ae22f9af7d2c7b32e2fc280f9
5790f129c4