Add support for (non-recursively) including config files in the build config

This is useful for building several similar, but distinct images (e.g.
XO-1 vs. XO-1.5, Gnome vs. no Gnome).

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/README b/doc/README
index 16e6d4f..a8b8d47 100644
--- a/doc/README
+++ b/doc/README
@@ -158,6 +158,13 @@ modules_<ANYTHING>
     Additional modules to include (allowing you to append to the list of
     modules in an additional configuration file)
 
+include
+
+    Additional config files to include (non-recursive). Except for
+    global.modules, your main config will override values set in the
+    included configs. You can use all values defined in the DEFAULT
+    sections of the included configs for interpolation.
+
 
 In general, options need to be set with care.  Aim to stick with the
 values shown in the examples where possible.  For example, if you were