default kmsg symlinking to on, and document lxc.kmsg

doc/lxc.conf.sgml.in

@@ -554,6 +554,25 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
     </refsect2>
 
     <refsect2>
+      <title>Enable kmsg symlink</title>
+      <para>
+      Enable creating /dev/kmsg as symlink to /dev/console.  This defaults to 1.
+      </para>
+      <variablelist>
+    <varlistentry>
+      <term>
+        <option>lxc.kmsg</option>
+      </term>
+      <listitem>
+        <para>
+          Set this to 0 to disable /dev/kmsg symlinking.
+        </para>
+      </listitem>
+    </varlistentry>
+      </variablelist>
+    </refsect2>
+
+    <refsect2>
       <title>Mount points</title>
       <para>
 	The mount points section specifies the different places to be

src/lxc/conf.c

@@ -2068,6 +2068,7 @@ struct lxc_conf *lxc_conf_init(void)
 	new->console.name[0] = '\0';
 	new->maincmd_fd = -1;
 	new->rootfs.mount = default_rootfs_mount;
+	new->kmsg = 1;
 	lxc_list_init(&new->cgroup);
 	lxc_list_init(&new->network);
 	lxc_list_init(&new->mount_list);