vswitch: Improve documentation for datapath_id column.

It was insufficiently documented that the vswitch, not the user, sets the
datapath_id column, which confused people (including me).  This commit
fixes the problem.

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index 345744e6d7a3936ed64696d7085320d23b4acc9b..d17b0822d753438f9eeff1ed6ae7580bf57a8fee 100644 (file)
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -112,7 +112,10 @@
       </column>
 
       <column name="datapath_id">
-        Reports the OpenFlow datapath ID in use.  Exactly 16 hex digits.
+        Reports the OpenFlow datapath ID in use.  Exactly 16 hex
+        digits.  (Setting this column will have no useful effect.  Set
+        <ref column="other_config"/>:<code>other-config</code>
+        instead.)
       </column>
     </group>