README: Annotate kernel dependencies

diff --git a/README b/README
index 176a2de..71c8c2d 100644 (file)
--- a/README
+++ b/README
@@ -20,3 +20,10 @@ Configure automatically searches for all required components and packages.
 
 To compile and install run:
        make && make install
+
+
+Kernel Dependencies
+===================
+
+In order to have the PPP stack working in oFono you need to enable CONFIG_TUN
+(Universal TUN/TAP device driver support) in your kernel .config.