[Nix-dev] comments about nixos's documentation

[Marc Weber]

comments about installation:
nixos.org -> nixos -> Documentation -> "Nixpkgs manual" link.

- typo: "Thus, installation from binaries falls back on nstallation from source"

- (channels stable): is just outdated: That's correct. eventually it should also be noted
  that its more likely to contain security vulnerabilities? Or does somebody
  care and backport fixes !?

- 4.1 Basic package management:
  Its told that manifest contain list of available binaries
  However because the manifests are no longer downloaded I guess that the 
  /etc/nix/nix.conf's binary-caches setting is much more important to talk
  about ?

I didn't find the doc source (?) - so I'm not sure how to improve it
other then notifying about it.

Marc Weber