ovs-vsctl: Update man page description of controller support.

ovs-vswitchd supports passive OpenFlow connections, but that was not
indicated in the documentation.  Add that information as well as a
description of Primary (active) and Service (passive) control
connections.

diff --git a/utilities/ovs-vsctl.8.in b/utilities/ovs-vsctl.8.in
index 3e9192c..ef862df 100644 (file)
--- a/utilities/ovs-vsctl.8.in
+++ b/utilities/ovs-vsctl.8.in
@@ -324,8 +324,13 @@ output.
 .SS "OpenFlow Controller Connectivity"
 .
 \fBovs\-vswitchd\fR can perform all configured bridging and switching
-locally, or it can be configured to connect a given bridge to one or
-more external OpenFlow controllers, such as NOX.
+locally, or it can be configured to communicate with one or more
+external OpenFlow controllers.  The switch is typically configured to
+connect to a primary controller that takes charge of the bridge's flow
+table to implement a network policy.  In addition, the switch can be
+configured to listen to connections from service controllers.  Service
+controllers are typically used for occasional support and maintenance,
+e.g. with \fBovs\-ofctl\fR.
 .
 .IP "\fBget\-controller\fR \fIbridge\fR"
 Prints the configured controller target.
@@ -339,6 +344,7 @@ use any of the following forms:
 .
 .RS
 .so lib/vconn-active.man
+.so lib/vconn-passive.man
 .RE
 .
 .ST "Controller Failure Settings"