uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/doc/manual/configuration/ssh.section.md

@@ -0,0 +1,19 @@
+# Secure Shell Access {#sec-ssh}
+
+Secure shell (SSH) access to your machine can be enabled by setting:
+
+```nix
+services.openssh.enable = true;
+```
+
+By default, root logins using a password are disallowed. They can be
+disabled entirely by setting
+[](#opt-services.openssh.permitRootLogin) to `"no"`.
+
+You can declaratively specify authorised RSA/DSA public keys for a user
+as follows:
+
+```nix
+users.users.alice.openssh.authorizedKeys.keys =
+  [ "ssh-dss AAAAB3NzaC1kc3MAAACBAPIkGWVEt4..." ];
+```