Hi, rc.conf is a bit documented in several places: 1) in rc.conf itself, although documentation there is a bit limited (not always explaining what things are for exactly) but it does contain stuff like examples for networking. 2) in the official installation guide, which has historically been more extensive in describing what things are for and how to make your choice, although it lags behind because it is not tightly coupled to rc.conf, usually I update it when I notice (or somebody tells me) it's out of date. 3) https://wiki.archlinux.org/index.php/Rc.conf which is similar to (2) but with a few more tips, it seems to be maintained by the community.
Also I notice there is no manpage for rc.conf. How can we improve this situation? Maybe by maintaining a man page for rc.conf which is as extensive as what currently in the official install guide? then, in the official installation guide, I can just refer to the rc.conf manpage, meaning the documentation is always in sync, at the same time it would also allow to make the documentation in rc.conf a bit more minimal.