ref-manual: Adds x11 to Distro Feature list.

Before this change, x11 was only documented as an IMAGE_FEATURE.
However, it is heavily relied upon as a DISTRO_FEATURE by
pacages that have an optional X dependency determined during
build time.  Examples include libsdl, dbus, alsa, and
pulseaudio.

(From yocto-docs rev: dd243b453b6d69bc439dda816fa5c9c83c5c3cd4)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/documentation/ref-manual/ref-features.xml b/documentation/ref-manual/ref-features.xml
index f5641c69ac..6f5dc00132 100644
--- a/documentation/ref-manual/ref-features.xml
+++ b/documentation/ref-manual/ref-features.xml
@@ -177,6 +177,8 @@
                     supports it.</para></listitem>
                 <listitem><para><emphasis>wifi:</emphasis> Include WiFi support
                     (integrated only).</para></listitem>
+                <listitem><para><emphasis>x11:</emphasis> Include the X server
+                    and libraries.</para></listitem>
             </itemizedlist>
         </para>
     </section>